The Anatomical Chart Series by Peter Bachin and Ernest Beck is a flip-page guide that includes excellent anatomical charts. It appears to be out-of-print but you can find it used.
The Human Body by Ruth & Bertel Bruun is a great and colorful children’s anatomy book. You can find it used for around $3.
Of my maybe dozen books on anatomy (always fascinated by what Dr. Henry Bieler author of Food Is Your Best Medicine calls “the magnificent human body”), this is the masterpiece: Atlas of Human Anatomy by Frank Netter.
How any one human could do all these exquisite drawings in a lifetime is beyond me. The drawings of the hand are spectacular. There is no descriptive text, so I don’t know if this is the perfect text for helping with self-diagnosis, but this is a reference book anyone interested in the human body should have.
I have an older 4th edition, but they recently released the 5th.
My doctor was using a Grey’s Anatomy, and I sent him a copy of this and he was mightily pleased.
[Note: You can find Netter's Anatomy in various forms including an iPhone and iPod touch application for those on the go.-- OH]