While Mr. David A. Kelly has helped me and Kate write the Ballpark Mysteries books, he also does some books on his own, including a really cool picture book called Miracle Mud: The Secret Mud that Changed Baseball. The book tells the story of this mud, that comes from a secret place (in New Jersey!) that is used by ALL major league baseball teams. Who knew? It’s a really neat picture book, so consider checking it out if you want to get muddy. If you want more info, check out this review of Miracle Mud that I just came across.