Michael Ivankovich has been collecting hand-colored photography for over 25 years, especially David Davidson, Fred Thompson, and Sawyer. He is generally considered to be the country's leading authority on Wallace Nutting and Wallace Nutting-like pictures, as well as Wallace Nutting books, furniture, and memorabilia. He is the author of Collector's Guide to Wallace Nutting Pictures, Early 20th Century American Prints, and Wallace Nutting Furniture.