Arunn of Nonoscience has an excellent and extensive list of books of his choice, and has tagged me for my own choices. A nice way to collect reading material suggestions!
One book that changed your life?
Don't know about changing my life, but one "book" I keep going back to again and again is the Indian epic, the Mahabharata, in its various forms (from comic book through Rajagopalachari, Buck, Narasimhan and other versions). Not for any religious significance, but always for new insights in to human nature each time I read it. Marvellous.
One book you have read more than once?
Let's see now, if I had to pick only one, I'll pick Dawkins' The Selfish Gene. Not without its flaws, but always raising questions. A classic.
One book you would want on a desert island?
Hypothetically, "How to build a boat with no tools and a single coconut tree". Realistically, The SAS survival handbook. Get me out of there!
One book that made you laugh
Almost all of P.G. Wodehouse's books and Terry Pratchett's books. A particular recent favorite is Pratchett's Small Gods.
One book that made you cry
Haven't really cried after reading a book. But one book that left me really depressed was The scavenger's son.
One book you wish had been written?
Heh...this must be the sequel to Louis L'amour's historical fictionThe walking drum. The hero, Kerbochard, was well on his way to India. Wonder what would have happened after he reached "Hind".
One book you wish had never been written?
A book is a book. It always has some place.
One book you are currently reading?
I'm usually reading two or three books at a time. Just finished the memoirs of Louis L'amour, The Te of Piglet, a collection of Nobel lectures.
Now go and spread some book love, and tell me about new and wonderful books. I'll be happy to link to your post here if you let me know.