I have quite a few programming books, mostly cookbooks though, that show little examples/snippets and or O'Reilly reference books that I used to purchase when starting a new language to get an idea for the syntax. The best book that I have ever bought and read was "Advanced UNIX Programming" by Marc J. Rochkind. It helped me get a much firmer grasp on Unix programming and along with it C which I was lacking at the time.
I've got a copy of the Dragon book sitting on my desk, it is waiting to be read, waiting to be devoured and played with, but so far I just haven't had the time.
One book I would like to read and wrap my head around is the Gang of Four book, it seems like it is important to know the various different design patterns, but so far I don't feel like I have missed out and can recognise good design practices based solely on how they feel while I am writing them.