Listed below are books about supplemental enzymes. Any of these books can be purchased from

by clicking on either the book or the title.
Enzyme Nutrition: The Food Enzyme Concept
By Dr. Edward Howell
Avery Publishing

The Complete Book of Enzyme Therapy
By Anthony Cichoke
Avery Publishing Group

The Enzyme Cure: How Plant Enzymes Can Help You Relieve 36 Health Problems
 By Lita Lee, Lisa Turner, Burton Goldberg
Future Medicine Publishing
The Healing Power of Enzymes
By Dicqie Fuller Ph.D. Sc.
Forbes Custom Publishing
Enzymes: The Key to Health
By Howard F. Loomis, Jr.,
Arthur Davis Grote Publishing

Food Enzymes: The Missing Link to Radiant Health
By Humbart Santillo, Debra Kantor
Hohm Press

Enzymes and Enzyme Therapy: How to Jump-Start
Your Way to Lifelong Good Health
By Anthony Cichoke
Keats Publishing
Food Enzymes for Health and Longevity
By Dr. Edward Howell, Victoras Kulvinskas
Lotus Light Publication
Digestive Enzymes
By Jeffrey Bland, Earl R. Mindell, Richard A. Passwater
Keats Publishing
Digestive Enzymes: The Key to Good Health and Longevity
By Rita Elkins
Woodland Publishing

The Food Combining/Blood Type Diet Solution: A Personalized
 Diet Plan and Cookbook for each Blood Type
By Dina Khader, Irene Toover
Keats Publishing