Explored in "1632" by Eric Flint.

https://www.amazon.com/1632-Ring-Fire-Book-1-ebook/dp/B00BEQLQNE/

In the year 2000, the small town of Grantville (a small mining town in West Virgina) is transported by a mysterious "ring of fire" to Germany in 1632, in the middle of the Thirty Years' War.

I thought it was a very enjoyable read.

A couple of Meta posts: List of good fantasy hfy stories and Request for 'thrown into fantasy' subgenre and Fantasy is welcome, but where is it?

ones listed therein:

• A World Away from Yesterday - no magic, but the main character finds himself transported to another world inhabited by a relatively medieval species. It's ongoing at the moment with much more to come but what's there so far should tide you over for a bit.
  
• The Bathroom Adventures - not at all serious
  
• Burning/Building of Ashenvale - Novel length.
  
• A Heros War - Morey is summoned to a fantasy world under siege by the forces of darkness, called a Hero by the natives. Unknown to them, they got two 'Heroes' for the price of one. Dumped into a strange and dangerous fantasy world, Cato struggles to find out what happened to him and where he is. And perhaps there are advantages to not being a Hero. And perhaps not all the legends are true...
  
• JaketheSnakeBakeCake's Guide to Promt Jumping - Novel length. (also check out his Snake Report story, a bit different but still well received)
  
• Harry Potter and the Nat 20 - Milo, a genre-savvy D&D Wizard and Adventurer Extraordinaire is forced to attend Hogwarts, and soon finds himself plunged into a new adventure of magic, mad old Wizards, metagaming, misunderstandings, and munchkinry. Novel length
  
• the webcomic Erfworld
  
• Blessed are the Simple - basically Zero no Tsukima if Master Chief was the one summoned. Novel length.
  
• Blessed are the Simple: Lords of the Red Star - a spinoff set in the same universe written by a different author... possibly discontinued
  
• Release that Witch - An engineer takes over the body of a worthless prince and tries to introduce industrialization. Novel length.
  
• Stranded in Fantasy copied over 4Chan story. Novel length.
  
• I love this story - A man gets thrown into an alternate world after what was supposed to a harrowing escape from death. Follow him as he uses his knowledge from his previous life of research to adapt and survive in a place that is void of human contact, only to find out later how absurdly ridiculous his abilities are. Journey alongside this man as he attempts to change the new world for a better place, to turn it into one that he loves. Novel length.
  
  
• Spellslinger Series by RegalLegalEagle - he's not stranded in fantasy, but aside from that it's a lot like OTHNGW
  
  Published books, try: (Lol, all of these are "Novel Length")
  
  
• Schooled in Magic - this has a remarkably similar feel, but is less HFY more general fantasy (all the major characters are human)
  
• The Warslayer - think "Galaxy Quest goes fantasy"
  
• Centaur of the Crime - a crime scene analyst is kidnapped to solve a fantasy world murder
  
• 1632 - not into a fantasy world (or necessarily HFY) but a modern Appalachian town is suddenly transported to Germany, the year 1632AD
  
• Harry Potter and the Methods of Rationality - Harry Potter fanfic, where he applies the scientific method to magic (complete with the occasional explosion...) (not necessarily HFY, but...) - Personally recommended by the author of OTHNGW
  
• Critical Failures - D&D group gets magicked into their game
  
• Neil Gaiman's Neverwhere
  
• Poul Anderson's Three Hearts and Three Lions
  
• Dresden Files - It mostly deals with the supernatural, humans are generally seen as a prey species, but most of the denizens are secretly afraid of humanity.
  
• The Wiz Biz - a programmer gets summoned into a fantasy realm.
  
• Nightlord: Sunset starts off with this premise, although the main character got turned into a vampire before getting stranded in fantasy, so it's not necessarily HFY... still a fun read though
  
• The Soprano Sorceress also not necessarily HFY, still fun. A down on her luck singer gets transported to a world where music is magic, and tries to bring the world at least a little bit into the modern age
  
  More general fantasy:
  
  
• The Forest - now actually a published work, but still up for your enjoyment. Novel length.
  
• The Demon Hunter Series (as well as several of this author's other works) probably *Novel length** by now.
  
• My Name isn't Bon Bon Series - finished, if you like atmosphere more than any idea of what's going on - FINISHED
  
• Orcish Blood Series - closer to standard fare for fantasy
  
• Empire Series
  
• The Hero Series
  
• The Gardener - One shot.
  
• Mage - One shot.
  
• The Curious creature One shot.
  
• On the nature of warfare - One shot.
  
• survivor wanderers and Wanderers ashes - There's a host of others, but /u/Meatfcker writes tasty things.
  
• /u/Radius55 did a 'what happens when fantasy bad guys meets modern humanity'- you can find it in his history.
  
• /u/Haenir has some several such things.
  
• No Magic Required - One shot.
  
• Our Lack hereof - One shot.
  
• WP: Alien Battles and the series 501st Mind Games that came from it
  
• Steve Irwin's Fantasy Adventure - One shot.
  
• Bloodrunners Series - a guy who was a delivery man for the underworld which consisted of goblins, vampires and other creatures.
  
• Who the Hell are You - (sort of the fantasy equivalent of the Veil of Madness). Humans are "magic sinks" and thus are able to live in the dangerously magically charged forest at the edge of elf civilization. The current elf government has been going all Third Reich on non-elves and non-high-elves for a while now. The humans know this and proceed with caution, before getting Allies and setting up beachheads. ^(sorry, I'll stop with the WW2 references now) :) we're also the only ones who invented dogs, and dey scary man.
  
• Steel and Sarcasm - a long buried human space ship is unburied, and the resident AI/kickass power suit personality adopts the human who found her and they proceed to fuck things up. (Her long time alone has led to some... interesting personality quirks, thus the "Sarcasm")
  
• Swords of Te'ra was fun.
  
• Red Blood Series - Every other species in the galaxy lives in a perpetual high fantasy state due to magic being the handwavium of the setting. Humans, by contrast are non-magical, but are so inherently toxic to magical systems (due to the iron content of their blood and equipment) that the very ground dies where they walks, and our blood is basically xenomorph blood. Sci-fi humans meets high fantasy everything else.
  
• All Sapiens Go To Heaven Series - a human wakes up in Hell and is dissatisfied with the service

MHI is part of Baen's free library. There's a large number of book 1's for various Baen series that remain free permanently on Amazon and other places.

----

The last time this was brought up here's what I said:

So Baen is heavier on SciFi than Fantasy/Urban Fantasy...and their authors tend to display their Conservative/Libertarian philosophies a bit more. But they do tell some fun stories if you lean towards their politics or can roll your eyes at that.

There's some others out there that I can't think of, but these are favorites of mine other than MHI...

John Ringo has a fantasy series I haven't gotten to yet and the weakest of his SciFi series up for free. I wish they had Live Free or Die or Through the Looking Glass, which are much much better series, but alas:

http://www.amazon.com/Hymn-Before-Battle-Legacy-Aldenata-ebook/dp/B00BEQP50Y/ref=la_B000APPSXE_1_1?s=books&ie=UTF8&qid=1456879886&sr=1-1&refinements=p_82%3AB000APPSXE

http://www.amazon.com/There-Will-Dragons-Council-Wars-ebook/dp/B00BER04VI/ref=la_B000APPSXE_1_2?s=books&ie=UTF8&qid=1456879886&sr=1-2&refinements=p_82%3AB000APPSXE

David Weber does great space navy battles in his Honor Harrington series.

http://www.amazon.com/Basilisk-Station-Honor-Harrington-Book-ebook/dp/B00ARPJBS0/ref=la_B000APBAFE_1_1?s=books&ie=UTF8&qid=1456879923&sr=1-1&refinements=p_82%3AB000APBAFE

Williamsons Freehold is a Libertarian's utopian heaven, but it's a favorite popcorn read of mine - the latter half is heavy military SF.

http://www.amazon.com/Freehold-Book-Michael-Z-Williamson-ebook/dp/B00BEQLTZY/ref=sr_1_1_twi_kin_2?ie=UTF8&qid=1456879862&sr=8-1&keywords=freehold

The Ring of Fire series is about a 1990's era West Virginia coal mining town that gets thrown back into the year 1632 in Europe.

http://www.amazon.com/1632-Ring-Fire-Eric-Flint-ebook/dp/B00BEQLQNE/ref=sr_1_4_twi_kin_2?ie=UTF8&qid=1456882709&sr=8-4&keywords=1632

You should check out Eric Flint's 1632 series. Basically a West Virginia coal town gets transplanted to 1632.

1632 (Ring of Fire Series) https://www.amazon.com/dp/B00BEQLQNE/ref=cm_sw_r_cp_apa_Xv0DAbX15Z157

I don't know if it still is, but for the longest time it was Free on Amazon.

EDIT: Still is free on Amazon. http://www.amazon.com/1632-Ring-Fire-Eric-Flint-ebook/dp/B00BEQLQNE/ref=tmm_kin_swatch_0?_encoding=UTF8&sr=&qid=

Download the kindle app somewhere and get reading if you don't have a kindle.

Sample.
The Course of Empire (Course of Empire Series Book 1) by Eric Flint
1632 (Ring of Fire Series) by Eric Flint
Northworld Trilogy by David Drake
Starliner by David Drake
Star Soldiers by Adre Norton
Oath of Swords (War God Book 1) by David Weber
On Basilisk Station (Honor Harrington Book 1) by David Weber
The Honor of the Queen (Honor Harrington Book 2) by David Weber
The Star Agency (The Star Agency Chronicles Book 1) by R.E. Weber
The Last Praetorian (The Redemption Trilogy Book 1) by Mike Smith
Hard Duty: Merkiaari Wars Book 1 by Mark E. Cooper
The Synchronicity War Part 1 by Dietmar Wehr
Dark Space by Jasper T. Scott
The Tank Lords by David Drake
Redliners by David Drake
A Desert Called Peace (Carrera Series Book 1) by Tom Kratman
Gunship by John Davis
With the Lightnings (Lt. Leary Book 1) by David Drake
Tales of Honor #1 by Matt Hawkins and Jung-Geun Yoon
The Fringe Worlds: (The Human Chronicles Saga Book #1) by T.R. Harris
Freehold (Freehold Series Book 1) by Michael Z. Williamson
The Last Roman (The Praetorian Series Book 1) by Edward Crichton
The Sea Hag by David Drake
Forbidden The Stars (The Interstellar Age Book 1) by Valmore Daniels
FCBD 2015: Tales of Honor by Matt Hawkins and Linda Sejic
The Philosophical Strangler (Joe's World Book 1) by Eric Flint
The Creatures of Man by Howard L. Myers
In the Heart of Darkness (Belisarius Saga Book 2) by Eric Flint
Northworld Trilogy by David Drake
Starliner by David Drake

I like the 1632 series - first book available free for Kindle http://www.amazon.com/1632-Ring-Fire-Series-Flint-ebook/dp/B00BEQLQNE (and other formats elsewhere for free)

A West Virginia mining town gets sent back in time to, you guessed it, 1632, and they jump start the industrial revolution during the 30 years war.

While all the anime/manga relations I can think of have already been mentioned, I can think of a number of Novels.

1) 1632 (aka The Ring Of Fire) Series.

Consists of roughly 40 books, with branching timelines. All the Timelines start with 1632 and 1633.

TLDR: The small american town of grantzvile and everything in a 2 mile circle is dumped in Germany during the middle of the cluster fuck that was the 30 years war.

[Summary of the first Novel.](/s "First thing they do is intervene in the pillaging of a nearby farm, second thing they do is rofl stomp a formation of ~600 french cavalry thanks to a nam vet and his M60 he had taken home with him , along about half the town arming themselves with bolt action hunting rifles and a few AR's. They then go on to form an alliance with Sweden, teaching them how to build and manufacture weapons that Sweden is realistically capable of mass producing like early 1800's era muzzle loading rifled muskets and breach loading cannons")

And they don't just go rofl stomping everything like the JSDF does, (Remember while gunpowder in the 15th century was still in it's early stages and melee combat was still the norm, it is still perfectly capable of killing someone) Such as when [Spoilers for 1633 & 1634: The Bavarian Crisis](/s "the spanish armada shows up, they manage to repel them with rocket artillery and napalm put together in the high school science lab, but they lose one of the 2 Fighter bombers they had built (Imagine a hellcat built with the Wood & Canvas materials of a WW1 Bi-plane and a Toyota Camry engine) and The only water craft that had come through with them, a speed boat with a jury-rigged knock off Katyusha launcher bolted to the deck. (Crew was almost all killed by 4 frigits broadsiding the speedboat with grape shot until they got lucky, then the only survivor Kamikazed the sinking boat into one of said frigits")

2) The Axis Of Time Trilogy

Consists of 3 books (In order); Weapon of choice, Designated Targets, and Final Impact. The first two books are available online in PDF format (Just ask and you'll get some dank links fam), the third book is paperback only as far as I can tell.

(W.I.P)

1632 by Eric Flint (Author released to to be free on Kindle)

Very well researched historical fiction about an American town from W. Virginia that gets dropped into the middle of Thuringia, Germany in the middle of the 30-years war.

For (currently) free Kindle books, David Weber's On Basilisk Station is the first book in the space-opera Honor Harrington series. The second book The Honor of the Queen, is one of my favorites in the entire series. Eric Flint's 1632 turned into a massive and awesome alternate-history series. If you'd like to delve into Alaskan-based murder mysteries, give Dana Stabenow's A Cold Day For Murder a try as the first in the some eighteen book Kate Shugak series.

For paid Kindle books, there's Hugh Howey's Wool Omnibus is the beginning of the dystopian Silo series; the followup Shift Omnibus is actually a prequel trilogy that I haven't gotten yet but is very readable. Naomi Novik's first novel in the alt-history Temeraire series, His Majesty's Dragon, is currently $.99.

In print, Elizabeth Moon's military fantasy The Deed of Paksenarrion is available used for a very affordable price and is an epic series. The Cage was my introduction to a fantasy universe written by SM Stirling, Shirley Meier, and Karen Wehrstein. Diana Gabaldon's Outlander is a sort of alternate history/light romance series set in Scotland that I've thoroughly enjoyed. Brent Weeks' assassin-based (excuse me, wetboy) fantasy Night Angel Trilogy was recently released as an omnibus edition. Empire from the Ashes collects Weber's Dahak sci-fi trilogy into an omnibus edition. Weber and John Ringo co-wrote March Upcountry and the other three novels in the sci-fi Prince Roger quadrilogy. If you haven't tried Harry Turtledove's alt-history sci-fi WW2 'Worldwar' series, In the Balance starts off a little slow plot-wise but picks up good speed. EE Knight's sci-fi/futuristic fantasy Vampire Earth starts off with Way of the Wolf. Mercedes Lackey wrote the modern-fantasy Born to Run with Larry Dixon, and the rest of the SERRAted Edge books with various other authors. Neal Stephenson's cyberpunk and slightly dystopian Snow Crash is hilarious and awesome. Maggie Furey's Aurian is the first of a fantasy quadrilogy that I enjoyed many years ago.

If you're at all familiar with the Warhammer 40k universe, the Eisenhorn Omnibus is Dan Abnett's wonderful look into the life of an Imperial Inquisitor. He's also written a popular series about the Tanith First-and-Only Imperial Guard regiment starting with The Founding Omnibus. He also wrote the first book in the Horus Heresy series, Horus Rising (I highly recommend reading the first three novels together as a trilogy and then cherry-picking the rest).

... and if you've read all that already, I'll be impressed.

Edit: Why yes, I do read a lot. Why do you ask?

I would like to think this is part of the reason Eric Flint used a coalmining town in his novels (The book is free and awesome and full of coalmining, gun nuts destroying European nobility). http://www.amazon.com/1632-Ring-of-Fire-ebook/dp/B00BEQLQNE/