A very good one is John Mason Hart's Revolutionary Mexico: it's pretty commonly used. Friedrich Katz's The Life and Times of Pancho Villa is a truly excellent - and careful- biography that sorts out a lot of legend from reality- but it's not a thin book, you'll need some time to go through it. Brenner's venerable The Wind that Swept Mexico has a simplistic and dated text, but includes a lot of great photos and used copies of it are common.

An excellent TV documentary, The Storm that Swept Mexico, is now over on YouTube

I really enjoyed Villa and Zapata: A History of the Mexican Revolution. Based on the title, it obviously centers around Pancho Villa and Emiliano Zapata, but it did a pretty good job explaining the other players involved and the events as a whole. A really engaging read, too.