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Jonathan Kaplan, Grace Helmer, et al.
Hannah Shaw and Kott Megan Lynn
Adult Coloring Books, Coloring Books for Adults, et al.
New Seasons and Lily Ashbury
Adult Coloring Books, Coloring Books for Adults Relaxation, et al.
Tony Kirkham and Holly Exley
John Muir Laws and Emilie Lygren
M. Amos Clifford
Clemens G. Arvay
Steve N. G. Howell and Brian L. Sullivan
Paul Ehrlich, Darryl Wheye, et al.
David Allen Sibley
David George Haskell