Worldwide

A Golden Guide - Orchids - Revised Edition - ​Floyd S. Shuttleworth, et al- Revised by Alec M. Pridgeon
A Guide to Orchids of the World - Margaret Hodgeson, et al
A Manual of Orchidaceous Plants - The Cypripedieae - James Veitch & Sons
A Manual of Orchidaceous Plants - The Oncidiinae - James Veitch & Sons
All About Orchids - Charles Marden Fitch
Botanica's Pocket Orchids
Breeding and Cultivating Paphiopedilum Hybrids - Harold Koopowitz & Norito Hasegawa
Breeding Variegata Oncidiums - W.W. Goodale Moir & May A. Moir
Culture of the Phaelaenopsis Orchid - Bob Gordon
Encyclopaedia of Cultivated Orchids - Alex D. Hawkes
Exotic Orchids - Successful Indoor Gardening - Wilma Rittershausen
Growing and Displaying Orchids - A Step-by-step Guide - Wilma Rittershausen, et al
Growing Orchids - Expanding Your Orchid Collection - J. N. Rentoul
Growing Orchids - The Hybrid Story - J. N. Rentoul
Growing Orchids - The Specialist Orchid Grower - J. N. Rentoul
Growing Your Own Orchids - Wilma Rittershausen
Home Orchid Growing - Third Edition - Rebecca Tyson Northen
How to Grow Orchids - Sunset Editorial Staff
Kew Gardening Guides - Orchids - Joyce Stewart
Laeliinae Intergenerics - W.W. Goodale Moir & May A. Moir
Modern Orchid Growing for Pleasure and Profit - Orchid Club of South Australia Inc.
Orchid Biology Reviews and Perspectives, vol 1 - Joseph Arditti
Orchid Biology Reviews and Perspectives, vol 2 - Joseph Arditti
Orchid Biology Reviews and Perspectives, vol 3 - Joseph Arditti
Orchid Care - A Guide to Cultivation and Breeding - Walter Richter
Orchid Growing - John W. Blowers
Orchid Growing - Peter McKenzie Black
Orchid Growing for Everyone - Karl Matho
Orchid Growing Illustrated - Brian & Wilma Rittershausen
Orchids - Alice Skelsey
Orchids - David Menzies
Orchids - J. Oplt & J. Kaplicka
Orchids - Peter McKenzie Black
Orchids - A Complete Guide to Cultivation - O. Eigeldinger & L.S. Murphy
Orchids - An Illustrated Identifier and Guide to Cultivation - Mike Tibbs & Ray Bilton
Orchids - Care and Cultivation - Gérald Leroy-Terquem & Jean Parisot
Orchids - Wonders of Nature - Takashi Kijima
Orchids as House Plants - Rebecca T. Northern
Orchids for Everyone - Brian Williams, et al
Orchids Month by Month - Ralph Handcock & Margaret Smith
Popular Orchids - Brian & Wilma  Rittershausen
Proceedings of the 13th World Orchid Conference 1990 - Auckland
Rare Orchids Everyone Can Grow - Jack Kramer
Selected Orchidaceous Plants - Volume 2 - Roy Grubb
The Art and Craft of Growing Orchids - Leslie Bowen
The Complete Book of Orchid Growing - Peter McKenzie Black
The Genus Lycaste - J. A. Fowlie
The Handbook on Orchid Nomenclature and Registration - International Orchid Commission
The International Book of Orchids - L. Francis Hunt
The Manual of Cultivated Orchid Species - Helmut Bechtel, Phillip Cribb & Edmund Launert
The Orchid King : Frederick Sander - Arthur Swinson
The Orchids Scientific Studies - Carl L. Withner
The Practical Encyclopedia of Orchids - Brian & Wilma Rittershausen
You too  Can Grow Orchids - Ralph Handcock & Margaret Smith