Book excerpt: Here is an illustrated guide to understanding our poo! There's no denying it, the way our bowel movements look tells us quite a bit about our diets and gastrointestinal health. And while your health is no laughing matter, there is no reason not to have some fun when taking care of yourself. Know Your Shit is a fun and informative illustrated, quick-reference guide that helps you interpret your poop. If your poop is telling you that your diet needs to change, this book also helps you make good choices about the food you eat. The perfect bathroom book, you'll know exactly where to leave Know Your Shit.