"How to Develop a Sense of Humor" Leo Markun, 1943 (No. 475 - Little Blue Book)
 
The work argues that humor isn't a gift you're born with, but a habit of thought you can build. It breaks down the "why" behind laughter, focusing on how irony and unexpected twists catch the brain off guard. Instead of just giving you a list of jokes to memorize, it teaches you how to look at a normal situation and spot the absurdity hidden inside it. It’s less about being a "clown" and more about developing a sharp, observant mind that can use wit to handle life’s stresses.