Ask HN: Best books under 200 pages for developers?

Most of the highly recommended books for software developers are about 400 pages. Sometimes I want to start and finish a book in a weekend and 400 is too much for me. Which books under 200 pages do you recommend to software developers?

Bonus: Best non-tech books under 200 pages https://www.goodreads.com/list/show/19194.Best_Books_Under_200_Pages