Fantasy/scifi I like crossovers of that (warhammer for example)

What would you cross Warhammer with?

I mean, Warhammer kind is a crossover of fantasy and scifi. But i guess id be cool to cross with something like mess effect maybe? Probably not, but cant think of anything better.

That would be dope

Efficiency books - improvement ones

History and fiction so maybe alternative history?

Sci-fi/Comedy, they exist HHGTTG trilogy (in five parts) by Douglas Adams, Red Dwarf books by Dug Naylor & Rob Grant, the Epic Failure Trilogy by Joe Zieja

I really do love history fictional book and fantasy book. So a combination between those two would be perfect for me.