Start with high-confidence organic farming books, then narrow by subgenre or adjacent topics.
Organic, Inc.
Samuel Fromartz
Everything I Want to Do Is Illegal
Joel Salatin
Organic Resistance
Venus Bivar
The One-straw Revolution
Masanobu Fukuoka, Larry Korn
Lentil Underground
Liz Carlisle
The Organic Farmer's Business Handbook
Richard Wiswall
Sowing Seeds in the Desert
Dirt to Soil
Gabe Brown
No-till Intensive Vegetable Culture
Bryan O'Hara
Organic Manifesto
Maria Rodale
The Self-fed Farm and Garden
Eliot Coleman
The Organic Seed Grower
John Navazio