The Midnight War of Mateo Martinez is a good read. Although the beginning starts slow, the action quickly rises to catch the reader's interest. Mateo was a character that I enjoyed. He took on a responsibility that may sound crazy at first, and it takes readers on an adventure. This story is about responsibilities and growing up. Things change as you grow up. Friends change, you change, and situations change. I recommend this book for elementary and middle grade students who enjoy mystery and adventure.