Hi John,
Names for categories:
Here's the list of dependencies (category/ title/ author/ publisher):

Farming  -  Cancer: Cause & Cure. A 20th Century Perspective by Percy
Weston (Bookbin)
Health -  Cancer: Cause & Cure. A 20th Century Perspective by Percy Weston
(Bookbin)
Health -  Cancer-Fighting Foods. With Introduction by Percy Weston (Bookbin)
Health -  A Consumer's Guide to the Pill and Other Drugs by John Wilks (ALL)
Health - Let's Play Doctor by J.D. Wallach and Ma Lan (Wellness)
Health - Let's Play Herbal Doctor by J.D. Wallach and Ma Lan (Wellness)
Health -  Living Proof. Is there a cure for cancer? by John Cirocco (MG)
Health -  The Hidden Drug: Dietary Phosphate by Hertha Hafer (PhosADD)
Health -  The Cure for All Cancers by Hulda Regehr Clark (NCP)
Health -  The Cure for All Advanced Cancers by Hulda Regehr Clark (NCP)
Health -  The Cure for All Diseases by Hulda Regehr Clark (NCP)
Health -  The Cure for HIV and AIDS by Hulda Regehr Clark (NCP)
Health -  The Cure for All Cancers by Hulda Regehr Clark (NCP)
Health - Your Health At Risk by Toni Jeffreys (HATM)
Health - Rare Earths Forbidden Cures by J.D. Wallach and Ma Lan (DHPC)
History -  Cancer: Cause & Cure. A 20th Century Perspective by Percy Weston
(Bookbin)
Gardening - Organic Gardening by Peter Bennett (NHP)
General -  Cancer: Cause & Cure. A 20th Century Perspective by Percy Weston
(Bookbin)
Nutrition - Cancer-Fighting Foods. With Introduction by Percy Weston (Bookbin)
Nutrition - Let's Play Doctor by J.D. Wallach and Ma Lan (Wellness)
Nutrition - Let's Play Herbal Doctor by J.D. Wallach and Ma Lan (Wellness)
Nutrition - Rare Earths Forbidden Cures by J.D. Wallach and Ma Lan (DHPC)