In this festive chapter book, Mike and Kate get the BEST Christmas present ever--a mystery at the Baseball Hall of Fame! After volunteering to wrap presents for charity, Mike and Kate get a special thank-you: a sleepover at the Baseball Hall of Fame! But when they're sneaking around the museum late at night, their flashlight reveals that one of the famous baseball cards on display is a fake! Can they find the real card, catch the crook, and get the presents to the charity's Christmas party on time? It's up to Mike and Kate to turn this Christmas mess into a Christmas miracle! Ballpark Mysteries are the all-star matchup of fun sleuthing and baseball action, perfect for readers of Ron Roy's A to Z Mysteries and Matt Christopher's sports books, and younger siblings of Mike Lupica fans. Each Ballpark Mystery also features Dugout Notes, with amazing baseball facts.