I have the 'Discover the horse you never knew'. Its pretty basic stuff, but I found a lot of it useful. Some of the excercises are very similar to Clinton Anderson as far as desensitizing.
I do the first 3 steps pretty regular with Vida and I have seen improvement as far as her bonding to me. I think I got it on ebay for around $30-40 I think its $49 on his web site, so shop around.
"Until one has loved an animal, part of one's soul remains unawakened..."
- Anatole France