I've read books by Nancy Clark and they are good. I also like, for nutrition/diets for athletes: Eat To Win by Dr. Robert Haas and 3 Season Diet by Dr. John Douillard.
For training, Body, Mind and sport by Dr. John Douillard and Body Fitness for Women by Gerard Thorne.
In case you're interested the link to Dr. John Douillard is http://www.lifespa.com/Ayurvedic Health Care Products/Our Products/Educational Products/eduprod.htm