Reddit mentions of Koban

The Koban series was a hoot

There's Koban by Stephen Bennett. The writing can get rough (and it needs some serious editing - it's a self published ebook) but the idea is fun. Basically, humans are captured and taken to a planet to help with some alien warrior training by being hunted by said aliens. Shenanigans ensue. You'd dig it.

[heres one] (https://www.amazon.com/dp/B00ABAXFCY/?tag=kbsig-20#nav-subnav)

[and another] (https://www.amazon.com/gp/product/B008YNZC0I/ref=s9_acsd_al_bw_c_x_3?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=merchandised-search-3&pf_rd_r=YSW5VZ563ZBGGZQEX76F&pf_rd_t=101&pf_rd_p=2612251942&pf_rd_i=7078878011#nav-subnav)

[and a really bad one] (https://www.amazon.com/Zombies-versus-Aliens-Vampires-Dinosaurs-ebook/dp/B018XQAA98/ref=sr_1_55?s=digital-text&ie=UTF8&qid=1473779767&sr=1-55#nav-subnav)

all those books have a lot of reviews so are clearly being read.

And if those aren't bad...then it's like I was saying... are we talking a kid drawing the cover in crayons to qualify as bad?

I'm not disagree that covers matter, I stated that up front. Just that they do not matter as much as everyone likes to think. I repeat though, they do matter... and one should care.

The books I listed above would probably have sold even more copies with better covers... but even with their bad covers they still managed to get a reader base going.