Any one book?
Mr. Penumbra's 24 Hour Bookstore, Robin Sloan
Any one series?
The Foundation series, Isaac Asimov
Other personal favourites include:
The Alchemist, Paulo Coelho
The Book of Disquet, Fernando Pessoa
The Count of Monte Cristo, Alexander Dumas
Extremely Loud and Incredibly Close, Jonathan Safron Foer Jonathan Livingston Seagull, Richard Bach
The Wizard of Earthsea by Ursula K. Le Guin
Any one series? The Foundation series, Isaac Asimov
Other personal favourites include: The Alchemist, Paulo Coelho The Book of Disquet, Fernando Pessoa The Count of Monte Cristo, Alexander Dumas Extremely Loud and Incredibly Close, Jonathan Safron Foer Jonathan Livingston Seagull, Richard Bach The Wizard of Earthsea by Ursula K. Le Guin