Hi Polyvios Animations. I have the book here 'Understanding Comics. The invisible art' by Scott McCloud. It's not really for gesture drawing. You could probably use the pictures in there as a reference. The book is a guideline on how to draw comics. It is written as a comic and it's a fun and intersting read. There are 9 chapters and these are the titles:
1. Setting the record straight (what is the definition of a comic and a bit of history)
2. The vocabulary of comics
3. Blood in the gutter ("nothing is seen between two panels, but experience tells you something must be there")
4. Time frames
5. Living in line
6. Show and tell
7. The six steps
8. A word about color
9. Putting it all together
