When I started my drawing tries..I was totally weak at anatomy and shapes, the books written by Andrew Loomis, Christopher Hart etc helped me a lot, their drawing are really awesome and I wonder when will I become like them. Here you go

1. Drawing Cutting Edge Comics by Christopher Hart
2. Drawing Cutting Edge Anatomy: The Ultimate Reference Guide For Comic Book Artists
by Christopher Hart
3. The Fantasy Artist’s Figure Drawing Bible: Ready-To-Draw Characters And Step-By-Step Rendering Techniques
by Matt Dixon
Finally Dragons
4. Dragonart: How To Draw Fantastic Dragons And Fantasy Creatures
by Jessica Peffer