Kodokan Judo: The Essential Guide to Judo by Its Founder Jigoro Kano	I'd recommend this book to anyone interested in judo. It's a good reference handbook for a beginning or an advanced student.
	The Canon of Judo: Classic Teachings on Principles and Techniques	Kyuzo Mifune is one of the greatest judoka who ever lived, and this is his book. Great techniques with detailed descriptions and advice on using them in randori
	Best Judo (Illustrated Japanese Classics)	This is a good, general purpose book with lots of techniques, pictures, and good descriptions.
	Mind Over Muscle: Writings from the Founder of Judo	This book is a compilation of translated writings from Jigoro Kano, the founder of judo. I've never read it, but plan to own it someday.
	Vital Judo	This is an out of print book dealing with tournament style throwing techniques. Well worth it if you can find it.
	Vital Judo: Grappling Techniques	This is my holy grail of judo. It's pretty hard to find a good copy(for less than $200), but I plan to own it someday. One of the best newaza books ever.