[.ca] Michelangelo (ISBN 0714832960)

comprehensive, but:
..most of the plates are in black and white and not of a very high definition. i also wished for more detail plates of the major works. still, though, a decent value for the price.

Photos galore!:
This is an excellent resource if you are looking for a comprehensive collection of photos of Michelangelo's works. Text is minimal but concise; the main focus is on the works themselves on page after page of gorgeous black and white photos. The only real drawback is that I would have liked to have seen more color plates of his paintings; there are only a few, focusing on the Sistine Chapel paintings, with close-up details shown in black and white photos.

Michelangelo: Paintings, Sculpture, Architecture:
This book provides great reference material.