[en] The Colorado Gardener's Companion: An Insider's Guide to Gardening in the Centennial State (Gardenin

[en] Great Garden Companions: A Companion-Planting System for a Beautiful, Chemical-Free Vegetable Garden

[en] Orchid Grower's Companion: Cultivation, Propagation, and Varieties

[en] The Oxford Companion to the Garden

[en] Secrets of Companion Planting: Plants That Help, Plants That Hurt

[en] The Victory Garden Companion