Hmm... I've had favourites for different periods of my life.
Dr Zeuss was up there when my kids were young. I had a lot of fun ad-libing after the first dozen readings of a given book.
Samual Clemmens (Mark Twain) Roughing It was a fascinating read
Zen and the Art of Motor Cycle Maintenance. I was fascinated by this book in the first read through. The second time I came to the conclusion he was on one big acid trip.
Ray Bradbury, Something Wicked This Way Comes. Creepy yet fascinating.
Chinua Achebe, Things Fall Apart. A fascinating look at the downfall of African society as the western world conquered 'the continent'.
Fyodor Dostoevsky, Crime and Punishment. Another creepy yet fascinating book.
Frank Herbert, Dune Best ever science fiction book!
Ursela K. LeGuin, The Dispossesed
Phillip K. Dick, Ubik
Steinbeck, pick one
Salmon Rushdie, Midnight's Children
