Enthusiastic Tracking, The Step-by-Step Training Manual
The author, an AKC tracking judge, has trained two dogs to their TDX, many to their TD, and has helped numerous students and friends accomplish this elusive goal.  In 1984, his Alicia became the first Westie to earn a TDX and in 1991, Mr. Q became the second.  Others he has coached to a TDX include dogs from five of the AKC groups, the first Bernese Mountain Dog, and several dogs that everyone had given up on but their owner.