Reddit mentions of Harrius Potter et Philosophi Lapis (Harry Potter and the Philosopher's Stone, Latin edition)

At first I was going to say "Latin is a dead language; Latin Harry Potter books don't exist." but then I got curious, googled it, and realized that there actually are Latin Harry Potter books.

I think it depends how strict you want to be. You can describe stuff like cars as "horseless carts" or something similar. I'd look at the Latin Harry Potter as an example.

There are some modern Latin resources that you can read every day.

The first that come to mind are:

• Ephemeris - modern news written in Latin
  
• Hobbitus Ille which you can find on Amazon, but apparently this link is to a free PDF version
  
• Harrius Potter et Philosiphi Lapis also on Amazon (along with other modern Latin books like Winnie Ille Pu).
  
• Project Gutenburg has some classic - modern Latin books also.
  
  Writing in Latin could also allow you to keep up. Keeping a journal or commonplace book can be helpful in a number of ways for a person, you could keep yours entirely (or mostly) in Latin. Might also give some level of privacy if nobody around you knows Latin.

How about this?

I think Harrius Potter is the closest you'll get for Latin.

EDIT: There are actually a few in the "recommendations" on that page, including Winnie the Pooh.

http://www.amazon.com/Harrius-Potter-Philosophi-Lapis-Philosophers/dp/1582348251

There's a Latin version too.

http://www.amazon.com/Harrius-Potter-Philosophi-Lapis-Philosophers/dp/1582348251