Tom Walker has lived in Alaska since 1963 and has been a patron of Denali National Park since 1969. Recently a park lodge operator described him as "Denali's greatest living naturalist." In the years he has lived in Alaska, he has been a commercial pilot, wilderness guide, and log homebuilder. His vocations have always been writing and photography. He began photographing wildlife in his teenage years and writing in his early 20's. He went on to write numerous magazine articles and supplied photographs to countless publications and outlets. One of his books, Caribou: Wanderer Of The Tundra, won the Benjamin Franklin Book Award in 2000, category of nature and the environment. He is now 58 years old and a year-round resident of Denali Park.

His photojournalism pursuits have taken him to Antarctica, South America, Galapagos Islands, Canada, Mexico, Switzerland, and Scandinavia. At home, he is a lecturer and presenter of slide shows on both Alaskan history and natural history. He has been a guest speaker in Sweden and part of an illustrated lecture tour of Switzerland.

Tom is a full-time freelance writer and photographer. His publications include: We Live In The Alaskan Bush, text and photos; Building The Alaska Log Home, text and photos; Alaskan Wildlife, photos; Shadows On The Tundra, text; Denali Journal, text; River Of Bears, text; Alaska's Wildlife, photos and text; Caribou: Wanderer Of The Tundra, text and photos. He is co-Author of: National Geographic Guide To America's Outdoors: Alaska; Interior Alaska; and three Insight Guides: Whales, Alaska and Rainforests; and Alaska's Best Places. His writing has appeared in two anthologies: Out Among The Wolves and The Last New Land. His photography and writing have appeared in numerous publications worldwide.