This was the first of four Caldecott Honor Books by Leo Lionni. Published in 1960 and virtually out of print in hardcover for decades, Knopf acquired the hardcover rights from the original publisher just in time to showcase Lionni's 100th anniversary celebration in 2010 and the book's 50th anniversary. The bold graphics and beautiful cutout paper collages of colorful birds, foliage, and the clever green inch worm are as fresh and appealing as ever, and should appeal to a whole new audience in this accessible board book format.