A select group of titles have sold millions of copies, and have also earned the right to be considered classics of the picture book format. The sources below are the most current confirmation of sales Picturing Books was able to locate.

"The Surprising Ingenuity Behind Goodnight Moon"
Smithsonian Magazine, January 26, 2017

"The Very Hungry Caterpillar, Eric Carle's Beloved Children's Book, Now Available as an eBook"
Children's Book Council, October 18, 2016

"Bestselling Robert Munsch children's book Love You Forever to receive special pop-up edition in October"
Canadian Broadcasting Corporation, September 12, 2017

"Maurice Sendak's Where the Wild Things Are turns 50"
USA Today, November 20, 2013

"Guess How Old Guess How Much I Love You is? 20"
Publishers Weekly, Juanuary 6, 2015

"The Cat in the Hat at 60 (and a Half)"
Publishers Weekly, September 7, 2017

"Elizabeth Banks, Margot Robbie’s Paper Bag Princess Lands at Universal
Variety, October 31, 2017

"Viking Makes Way for the 75th Anniversary of Ducklings"
Publishers Weekly, March 17, 2016