| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2000 | 978-0-9666783-0-7 | David Del Porto · Carol Steinfeld | Composting Toilet System Book: A Practical Guide to Choosing, Planning and Maintaining Composting Toilet Systems |
| 2007 | 978-0-9666783-1-4 | Carol Steinfeld | Liquid Gold: The Lore and Logic of Using Urine to Grow Plants |
| 2008 | 978-0-9666783-3-8 | Carol Steinfeld · David Del Porto | Composting Toilet System Book: A Practical Guide to Choosing, Planning and Maintaining Composting Toilet Systems |