Although there are a few interesting elements and worthwhile anecdotes, overall this is not a volleyball coaching book I am inclined to recommend for reading.
Winning Volleyball is a book of its time in that is doesn't reflect the modern game in many respects, but it's not without value to current volleyball coaches.
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.