Softcover. Racine WI, Whitman Publishing, 1st, 1936, Book: Very Good, Dust Jacket: None, Softcover, approx. 64 pages. Color illustrated wrappers, stapled. B&w cartoons by Dunn illustrating a collection of some of the world's worst jokes - the 'knock-knocks'. Nice condition, paper has tanned and is brittle. Whitman #801.
 "Knock Knock: Who's There? : Featuring Enoch Knox by: Dunn, Bob")