Amazon

Promising review: "This is the best drawing book you'll ever pick up. Am I exaggerating? No, I am not. This book has no 'how to draw this step by step' parts. You don't want that, I promise. If your goal is to really improve your drawing skills, then get this book. This book gives you blank pages with a random prompt. Your goal is to draw that prompt. No guides. These prompts can range from a skunk, to a crayon, to David Bowie, to a sense of humor. Just random prompts.

Why is this the best thing for your skills? If you really want to get good at drawing, you have to practice drawing everything. You haves to expand and understand your mind reference library. The bigger you mind library is, the better art you will make." —Natalie

Get it from Amazon for $15.26.