Excelling
at Dog Agility : Book 1: Obstacle Training by Jane Simmons-Moake
The
author is one of the top Obedience competitors in the nation. I also have
her video series which I highly recommend to those who want to pursue the
sport of agility seriously.
Excelling
at Dog Agility - Book 2: Sequence Training by Jane Simmons-Moake
Switching
Sides : Making the Transition from Obedience to Agility by Kay Guetzloff
Peak
Performance : Coaching the Canine Athlete by M. Christine Zink
I
attended Dr. Zink's Canine Coach Clinic and found it very educational. Her
books are excellent too.