Here is a purely lore/fluff book made for Warhammer 40k.

You guys like biology textbooks? Well here is what kiddies read in the far future of 40K, just kidding, knowing about xenos is heresy.

Base +6, SatuOnDrugs +7, 58569 +8, nihdus +2, happyflappy +6, dakfuisthis +6, jkezer +10, HodorHodor +8, pentagonofpeople +6, TheMomSlayer +6, Shinron +6, LastArcanni +6, redred1134 +7, and 13 more...

Unless it's how to better take them apart on the glorious battlefield for the Emperor!

Base +6, IaY +9, Gamer.tv3 +4, Shinron +6, LastArcanni +6, Guardsman40k +6, xxxxes2 +5, magico alverman +14, num21 +6, Qwertius +5

To know your enemy.... Is to better understand their strengths & weaknesses!

Well except from The Ruinous Powers......

DO NOT GET TO KNOW THEM!!!!

AAARRRGGGHHHHH

WARP TAINT!!!

-*VERY LOUD KLAXON* ~ DANGER! ~ GELLA FIELD COLLAPSING IN 8 MINUTES ~ DANGER! ~ *VERY LOUD KLAXON*

Attention all personnel this is the Ship Master! I hereby order you all to evacuate to the bunker decks!

WARP WARP WARP WARP WARP WARP WARP

Base +6, Guardsman40k +6, xxxxes2 +5, kondoriyano -6, Yakhont69 +8, 苍肥皂 +6

神皇在上啊！

Base +2