There is a plethora of information out there. Where do you want to begin? Human variation, the role of fascia, bones, muscles, etc?
For a look at how the bones and their variations affect our practice, check out Paul Grilley's DVD
Anatomy for Hatha Yoga. It is a must have for all yoga teachers. For basic anatomy knowledge, pick up a good reference book like
Thieme Atlas of Anatomy. Blandine Calais-Germaine's book,
Anatomy of Movement is also excellent. For fascia related learning, you can start with Thomas Myers'
Anatomy Trains. Check out Gil Hedley's
work too ... fascinating. Oh yes, Leslie Kaminoff's book is great:
Yoga Anatomy.
I am in the middle of writing an anatomy text for yoga students as well, to be called Your Body - Your Yoga, but that is a little ways off into the future, however.
Good luck!