Some of the books I have in mind might make sense as a game, but they would be a really odd combination of genres. There are actually a few books that I would just like to see how they would form a game around it.
I liked Going After Cacciato, which could have some interesting sections as the team travels through the Vietnam jungle, and a few fighting sections when the imagine escaping from a prison somewhere (I think it was Iran). However, I would have no idea if the rest of the book would make a game, since it might not be anything more than a story players would play through.
I guess developers were able to figure out a way to make The Series of Unfortunate Events into a game, and if I remember correctly it was kind of fun as a kid. They took some liberties, but they kept the same concept around. Perhaps I should consider not making a book into a game, but rather taking a concept of a book and turning it into a game?
Lastly though, I would really like to see more graphic novels and comics be turned into a game. I know they kind of did that for the 2005 The Punisher game since a lot of the ideas came from Welcome Back Frank, and the Batman Arkham games took a lot of ideas from Batman comics. I would really like to see a Blade videogame, or a Daredevil videogame. Even a non-movie tie in Spider-man game would be great (although Spider-man 2 was really good as is). I just would like to see games take a bit more from comics, rather than just waiting for a new movie to come out in order to make a game. I would really like to see another Hellblazer videogame, even though I know they did do one with Constantine.