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 volleyball coaches and volleyball players/parents in working on strength and conditioning, for college volleyball or otherwise.
Coaching Volleyball Successfully is an absolutely fabulous resource for new and developing volleyball coaches.