...
Dueling definitions (some broader, some more restrictive):
“Books that are produced by artists and intended as visual art objects.”--Library of Congress Genre/Form Headings
“An artist’s book is a medium of artistic expression that uses the form or function of “book” as inspiration. It is the artistic initiative seen in the illustration, choice of materials, creation process, layout and design that makes it an art object.” --Anne Evenhaugen, What is an artist’s book? (Unbound (Smithsonian), June 1, 2012).
...