I like both non-fiction and fiction.

For non fiction, I generally prefer military history books, like Osprey.
Also, historical novels are my thing. Here are some of my favourites:

-Spartaco, Raffaelo Giovagnoli
-Fall of Constantinople, by a Romanian author

As for the other genre, I like:

Clive Cussler's novels. I like them a lot!!

I'll put some more. Can't think of right now...