Breakthrough Publications
Offers books and videos for sale providing educational material (college level) on all breeds of horses, riding, training, care, health and management.
http://www.booksonhorses.com/

Cherry Hill Books
Horse and equestrian books on training and management.
http://www.horsekeeping.com/

Connemara Pony
Features a selection of books on the popular breed.
http://www.connemara-pony.net/

Conquistador Magazine
For all Spanish horses such as Andalusians, Paso Finos, and Peruvians.
http://www.conquistador.com/

Equine Research, Inc.
Catalog of horse books and videos.
http://www.equine-research-inc.com/

Exclusively Equine
Selection of horse books, videos, and more.
http://www.exclusivelyequine.com/

Healing Power of Horses
By Wendy Beth Baker. Offers lessons from Lakota Indians who have been strengthened mentally and physically by their relationship with horses.
http://www.healingpowerofhorses.com/

Horse Information Center
Specializing in hard-to-find books, videos, and software.
http://www.horseinfo.com/

Knight Equestrian Books
Specializes in horse books: riding, veterinary, and fiction for children and adults.
http://www.knightbooks.com/

October Farms Horse Books
Out-of-print books on horses.
http://www.octoberfarm.com/

Seabiscuit: An American Legend
Book about the famous racehorse by Laura Hillenbrand.
http://www.seabiscuitonline.com/