Volleyball Skills & Drills is a book by the American Volleyball Coaches Association featuring a ten useful chapters on the various aspects of coaching the game.
As it's title suggests Coaching Volleyball Technical and Tactical Skills is a book focused on teaching the technical skills and tactical aspects of volleyball.
Here's my review of the book Incredible Volleyball Lead-Up Games and Drills, which has some potentially useful features for volleyball coaches.
Thinking Volleyball by Mike Hebert will make you think about your volleyball coaching, not just present you with a bunch of drills and training techniques.
With lots of tools to help assess a team and players, and strategies on how to address issues, this book could be a long-term volleyball coaching reference.
While not a volleyball coaching manual, this book provides a lot of interesting and thought-provoking tidbits, interspersed with a fair amount of humor.
This book may be quite useful for both coaches and players/parents in working on strength and conditioning, for college volleyball or otherwise.
Coaching Volleyball Successfully, by legendary high school coach Sally Kus, is an absolutely fabulous resource for new and developing volleyball coaches.