Important textbook notes!
The required textbook: Permaculture: A Designer's Manual, by Bill Mollison (Tagari Publications, Reprint edition
August 1, 1997, 576 pages, ISBN: 0908228015).
Optional (but not required) textbooks are:
An Introduction to Permaculture, by Bill Mollison and Reny Mia Slay, Permaculture Resources (publisher), Tyalgum, Australia. 1991, 198 pages.
Permaculture: Principles and Pathways Beyond Sustainability, by David Holmgren, Holmgren Design Services (publisher), 2002, 286 pages.
Water For Every Farm: Yeomans Keyline Plan, by P.A. Yeomans, Eco-logic Books/Worldly Goods (publisher), 2002, 378 pages.
Edible Forest Gardens, by Dave Jacke, Chelsea Green (Publisher), 2005, 672 pages.
Textbooks may be found on-line at www.seedsofchange.com; www.amazon.com