This title explores the world-changing invention of the toilet and how it helped revolutionize sanitation and waste removal. This title is at a Level 3 and is w

3 Day Potty Training is a fun and easy-to-follow guide for potty training even the most stubborn child just 3 days. Not just for pee and poop but for day and ni

The most comprehensive, up-to-date and thoroughly researched book on the topic of composting human manure available anywhere. It includes a review of the histor

Did you know that about 40 percent of the world's population lives without toilets? That's more than two billion people, most of whom live in rural areas or cro

This illustrated book gives young readers “a breathtaking and entirely original insight” into the complex systems that exist underneath modern cities (Kirku