Books that should be games

120 Days of Sodom

The Old Man and the Sea.

Not sure if they apply, but there's a lot of Warhammer-related novels that would make awesome games.

A Ciaphas Cain adventure/RPG one would be amazing.

The Dark Tower, clearly

As far as Anne McCaffrey goes, check out "Dragon Riders: Chronicles of Pern" on Dreamcast and "Dragonriders of Pern" for Commodore 64

Night Angel Trilogy by Brent Weeks. Best fantasy book I've read since The Witcher Saga. It's also perfect setting for a game ! But I wouldn't trust any big company with it. It'd be the same story as with all the other book and movie franchises (except Witcher of course). If I was a little better at programming I'd start making it myself (to be honest I'm still thinking about improving my programming skills and actually doing it).
Also, by the same author, The Lightbringer series. Only one book is out yet, but it looks like another awesome series and game material at the same time.

Insert random textbook name would make a good game. Just imagine, Organic Chemistry: The Game

MAKE IT HAPPEN DEVELOPERS!

A game based off George Orwell's 1984 or Animal Farm ^^

Tales of the Otori ... nuff said

broken sky (chris wooding): MMORPG, RPG (sp), or RTS

Bartimaeus Trilogy!

I've been addicted to the Wool series by Hugh Howey. That would make an excellent adventure game with horror elements.

Sandman

Fight Club, Survivor, Illuminati trilogy.

Dragonlance books, though the game should be really well made to deserve to be based on such epicness.

Not sure, am looking forward to Otherland though, hopefully they dont screw it up...

bible

any book by arthur c clarke and issac asimov would have great games

The Septimus Heap series would be an ok game with SO MUCH MAGYK

Golden Compass series

An adventure game in that world would be brilliant.