Category #2 for the 2016 MMD Reading Challenge is “a book you can finish in a day.”

This could be a long book, or a very short book, depending on your reading speed and what title you choose. But if you’re still looking for a book to fulfill this category, I’ve gathered up a list of likely suspects.

These twenty slim nonfiction works all run 200 pages or less, and deliver a lot of bang for the buck. Most readers can knock one of these off in an afternoon, but will think about what they read between the covers for weeks, months, even years after they finish.

(Head here for a list of short fiction works you can finish in a day.)

What are YOU reading for this category? (This is my pick. It’s not nonfiction.)