AGILITY BOOKS

There are several newer agility books available:

CLICK & PLAY AGILITY
by Angelica Steinker, 2006
This book offers detailed clicker training for agility with a very playful approach.

DO IT YOURSELF AGILITY EQUIPMENT
by Jim Hutchins, 2002
27 detailed construction plans for making everything from a welded aluminum A-frame to contact training hoops. Each plan includes a list of materials and tools needed as well as numerous illustrations to help simplify the construction of each obstacle.