If you have a composting toilet system in your home, you need a solution for greywater - the wastewater from your home excluding water from toilets. Greywater consultant and systems designer Art Ludwig has written two books on how to create an oasis with greywater. Each book is 8 1/2" x 11".

Create an Oasis with Greywater - NEW Revised and Expanded 5th Edition (pictured)
This revised and expanded edition includes all the content of "Branched Drain Greywater Systems," plus 50 pages of new material including guides to choosing, building and using the right greywater system for your needs. It's truly a "comprehensive design and installation manual." 144 pp.