Is there a document/source?

—Anne Frank (1929-1945), diary entry dated Saturday, February 27, 1943 (age 13)

Anne Frank was given an empty card file by her father who filled it with index cards that were blank on one side. They were intended to use it as a "reading file" in which she and Margot were "supposed to note down the books we've read, the author and the date."

In the same entry she mentioned that she'd bought a separate notebook for writing down new words she encountered. Recent words she mentions encountering were "brothel" and "coquette".

This book was published originally in 1940 and apparently the Great Books of the Western World was hatched in 1943, so this book isn't necessarily a stepping stone to pitching/selling those, though obviously it informs the ideas which led up to its creation.

Note that it is roughly contemporaneous to his article a year later:

Adler, Mortimer J. “How to Mark a Book.” Saturday Review of Literature, July 6, 1941.<br /> https://stevenson.ucsc.edu/academics/stevenson-college-core-courses/how-to-mark-a-book-1.pdf

Don't Be a Sucker

https://www.b98.tv/video/wise-quacking-duck/

"Say. Now you're cooking with gas." Daffy Duck in an oven bathing himself in gravy.

The Wise Quacking Duck Warner Bros. (1943)<br /> Looney Tunes cartoon directed by Bob Clampett. <br /> Released on May 1, 1943