A new series for emerging chapter-book readers combines the allure of baseball parks with the challenge of solving a mystery. Mike and Kate have tickets to a Red Sox game and an all-access pass to the park, courtesy of Kate's mom, a sportswriter. The pass comes in handy when it's reported that star player Big D's lucky bat has been stolen, as it allows them to help find the thief. Historical details about Fenway Park, including the secret code found on the manual scoreboard, a look at Wally the mascot and a peek into the gift shop, will keep the young baseball fan reading, even when the actual mystery of the missing bat falls a little flat. Writing mysteries for very young readers is a challenge—the puzzle has to be easy enough to solve while sustaining readers' interest. This slight adventure is more baseball-park travel pamphlet than mystery, a vehicle for providing interesting details about one of the hallowed halls of baseball. Not a homerun, but certainly a double for the young enthusiast. On deck? The Pinstripe Ghost, also out on Feb. 22, 2011. (historical notes) (Mystery. 6-9)