For me, I had a few that I really liked:
* The Art of Game Design by Jesse Schell. Probably one of the best books I've read, even for people who don't want to make games, it was really good.
* Business Model Generation by Osterwalder and Pigneur. One of the better business books I've read through. Also one of the most creative.
And I finally read:
* The C Programming Language by K&R. 'nuff said.