Among the Bears – Raising Orphan Cubs in the Wild. Benjamin Kilham and Ed Gray, 2002. A John Macrae Book, Henry Holt and Company, pp 289.
Barle's Story- One Polar Bear's Amazing Recovery from Life as a Circus Act. Else Poulsen, 2014 Greystone Books, pp 256.
Bear Attack – Their Causes and Avoidance. Stephen Herrero, 2003. McCelland & Stewart Ltd. pp 282.
Beauty Within the Beast – Kinship with Bears in Alaska. Stephen Stringham, 2002. Seven Locks Press, pp 287.
Don't Shoot the Dog – The New Art of Teaching and Training. Karen Pryor, 1999. A Bantam Trade Paperback – Nonfiction, pp 202.
Grizzly Heart - Living Without Fear Among the Brwon Bears of Kamchatka. Charlie Russell and Maureen Enns, 2002. Random House Canada.
Hand-Rearing Wild and Domestic Mammals. Laurie Gage, 2002. Iowa State Press, pp 279.
Kinship to Mastery – Biophilia in Human Evolution and Development. Stephen R. Kellert, 1997. A Shearwater Book, Island Press, pp 256.
Management Guidelines for Bears and Raccoons. Partridge, J. editor. 1992. Bristol, UK: The Association of British Wild Animal Keepers,
Meant to Be Wild - The Struggle to Save Endangered Species Through Captive Breeding. Jan DeBlieu 1993. Golden, CO: Fulcrum Publishing, pp 302
Pleasurable Kingdom - Animals and the Nature of Feeling Good. Jonathan Balcombe, 2006. Macmillan, pp 274.
Polar Bears. Ian Stirling, 1998. The University of Michigan Press, pp 220.
Polar Bears - A Natural History of a Threatened Specie. Ian Stirling, 2011. Fitzhenry & Whiteside Press. pp 331.
Second Nature - Environmental Enrichment for Captive Animals. Shepherdson DJ, Mellen JD, Hutchins M, editors. Hutchins M, Maple TL, Andrews C, series editors. Washington DC: Smithsonian Institution Press, pp 350.
Smiling Bears - A Zookeeper Explores the Behavior and Emotional Life of Bears. Else Poulsen, 2009. Greystone Publishing, pp 272.
Stereotypic Animal Behaviour - Fundamentals and applications to Welfare. 2nd Edition. Edited by G. Mason and J. Rushen, 2006. CAB International, pp 367.
The Emotional Lives of Animals - A Leading Scientist Explores Animal Joy, Sorrow, and Empathy - and Why They Matter. Marc Bekoff (author), Jane Goodall (forward), 2007. New World Library, pp 244.
The Great Bear Almanac - Gary Brown, 1993. Lyons and Burford, pp 325.
The Shape of Enrichment Journal - A Quarterly Source of Ideas for Enrichment
Walking With Bears - One Man's Relationship with Three Generations of Wild Bears. Terry D. Debruyn, 1999. The Lyons Press, pp 248.
Wild Animals in Captivity - An Outline of the Biology of Zoological Gardens. H. Hediger, 1950. Butterworths Scientific Publications, pp 207.
Wild Health - How Animals Keep Themselves Well and What We Can Learn From Them. Cindy Engel, 2002. Houghton Mifflin Company,
Winter World - The Ingenuity of Animal Survival. Bernd Heinrich, 2003. Harper Collins Books, pp 347.
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