In this seventh sports-themed mystery, eight-year-old twins Zach and Zoe go on a school field trip to a pop-up museum, put on by the National Baseball Hall of Fame. On their tour, they discover one of the display items is missing from its case, and with the help of their classmates, they work together to figure out what happened.

Once again, bestselling author Mike Lupica charms his youngest readers yet with a detective duo who can swing for the fences and catch the culprit in one fell swoop. With a recipe of equal parts sports and mystery, the Zach & Zoe Mysteries break fresh ground for an author who has been called the greatest sportswriter for kids.