The book, published originally in the 1950s, has apparently fallen into the public domain, and now is totally free.
So what is the Famous Artists Cartoon Course? Imagine Julia Child’s Mastering the Art of French Cooking, but written by a dozen of the most successful commercial artists of the 1950s about the skills you need to cut it as a professional cartoonist. It is 18 chapters, 390 pages, on 8.5×11″ paper. There is approximately a 70:30 ratio of space taken up by text versus pictures (it’s a legit textbook).