Flowers, Trees, and Shrubs

• Manual of Woody Landscape Plants: Their Identification, Ornamental Characteristics, Culture, Propogation and Uses (Paperback)  Author: Michael Dirr
• Dirr's Hardy Trees and Shrubs: An Illustrated Encyclopedia [Illustrated]   Author: Michael Dirr
• Pruning (Rodale's Successful Organic Gardening) Author: Kris Medic
• The Natural Garden Author: Ken Druse
• The Natural Shade Garden: Ken Druse
• Caring For Perennials: What To Do and When To Do It Author: Janet Macunovich

Vegetable Gardening

• Rodale's Vegetable Garden Problem Solver    
  Author: Fern Marshall Bradley
• Carrots Love Tomatoes: Secrets of Companion Planting for Successful Gardening (Paperback)
  Author: Louis Riotte
• The Postage Stamp Garden Book: Grow Tons of Vegetables in Small Places
  Author: Duane G. Newcomb and Karen Newcomb

Composting

• The Rodale Book of Composting: Easy Methods for Every Gardener (Paperback)
  Editors: Grace Gershuny, Deborah Martin

Insects & Diseases

• The Organic Gardener's Handbook of Natural Insect and Disease Control: A Complete Problem-Solving Guide to Keeping Your Garden and Yard Healthy Without Chemicals (Paperback) Editors:  Barbara W. Ellis, Fern Marshall Bradley
• Rodale's Flower Garden Problem Solver: Annuals, Perennials, Bulbs, and Roses Authors: Jeff Ball, Liz Ball
• American Horticultural Society Pests and Diseases: The Complete Guide to Preventing, Identifying and Treating Plant Problems Authors: Pippa Greenwood, Andrew Halstead, A.R. Chase, and Daniel Gilrein

Landscaping

• Gardening with Prairie Plants: How to Create Beautiful Native Landscape Author: Sally Wasocki
• Landscaping with Wildflowers : An Environmental Approach to Gardening Author: James W. Wilson

The Environment

• Earth in Mind: On Education, Environment, and the Human Prospect
  Author: David W. Orr, 1994, Island Press
  Dept. Head of Environmental Studies and Politics at Oberlin College examines the roles that education and politics plays in our greater understandings of the environments around us.  Easy to read and should be part of every one's library and classroom.
• Living Downstream: An Ecologist Looks at Cancer and the Environment
  Author: Sandra Steingraber
  Sandra Steingraber, biologist, poet, and survivor of cancer in her twenties, brings all three perspectives to bear on the most important health and human rights issue of our time: the growing body of evidence linking cancer to environmental contamination. In a gripping personal narrative, she travels from hospital waiting rooms to hazardous waste sites and from farmhouse kitchens to incinerator hearings, bringing to life stories of communities in her hometown and around the country as they confront decades of industrial and agricultural recklessness.
• Noah's Garden: Restoring the ecology of our own backyards
  Author:  Sara Stein