Disc Golf Books

[Bager45]

I'm looking for some good literature on disc golf to help my overall technique. Ive seen some people recommend 'Golf is a Game of Confidence', but what are some other books to consider?

[ferretdance03]

Zen Golf (http://www.amazon.com/Zen-Golf-Mastering-Mental-Game/dp/0385504462/ref=sr_1_1?ie=UTF8&qid=1336733524&sr=8-1)
Golf Is Not a Game of Perfect (http://www.amazon.com/Golf-Not-Game-Perfect-Rotella/dp/068480364X/ref=sr_1_1?s=books&ie=UTF8&qid=1336733564&sr=1-1)
Putting Out of Your Mind (http://www.amazon.com/Putting-Out-Your-Mind-Rotella/dp/0743212134/ref=sr_1_1?s=books&ie=UTF8&qid=1336733596&sr=1-1)
Zen Putting (http://www.amazon.com/Zen-Putting-Mastering-Mental-Greens/dp/B000X1L5VO/ref=sr_1_1?s=books&ie=UTF8&qid=1336733621&sr=1-1)