Many years ago I was lucky enough to take part in a 12-month illustration class at Disney. I had incredibly talented teachers and among them (the others please don't take it the wrong way, you were all great), Denise’s lessons were the ones that really impacted my learning experience the most.
Her expertise, artistic and teaching skills are just amazing. So now guess what? You all can be as lucky as I was and get all her wisdom from this incredibly-well-done book she has just released.
Even if you are not into cartoony styles, the basic rules of composition and design are so well explained here. They are what every artist should know. Do yourself a favor: Go and get it right now!