Here are some interesting links and some good books and DVD's.
Books
True Horsemanship Through Feel by Bill Dorrance and Leslie Desmond
Horse Handling and Riding Through Feel an audiobook by Leslie Desmond
Tug of War: Classical versus "Modern" Dressage: why classical training works and how incorrect "modern" riding
negatively affects horses' health by Dr. Gerd Heuschmann
A Modern Horse Herbal, by Hilary Self, Kenilworth Press
All You Ever Wanted to Know About Herbs for Pets, by Mary Wulff-Tilford and Gregory Tilford
Herbal Handbook for Farm and Stable, by Juliette de Baircli Levey
The Horse's Pain-Free Back and Saddle-Fit Book by Joyce Harman
Dressage in Harmony from Basic to Grand Prix by Walter Zettl
Simplify Your Riding: Step-by-Step Techniques to Improve Your Riding Skills by Wendy Murdoch
LINKS