The story
The first Klutz book was a how-to guide titled Juggling for the Complete Klutz, which came provided with juggling beanbags attached in a mesh bag. The book was written by three classmates who graduated from Stanford University: Darrell Lorentzen, John Cassidy, and B.C. Rimbeaux.
Since then, the company continued to specialize in activity-driven books, sold along with other items needed for the activity. Not all the books are about developing a skill; there has also been a geography book containing, among other physical attachments, packets of rice corresponding to the average daily caloric intake among the poorest people of the world. Many of the books are spiral bound and teach different crafts. The items needed are usually included with the book, e.g. the juggling guide. The Klutz credo is: "Create wonderful things, be good, have fun."
From Wikipedia’s article on Klutz Press, shared under CC BY-SA 4.0.4