It's a mystery every month from popular A to Z Mysteries author Ron Roy With the younger siblings of the A to Z Mysteries kids March is for Madness... In the third book of the Calendar Mysteries - an early chapter book mystery series - it's St. Patrick's Day in Green Lawn. Bradley, Brian, Nate, and Lucy dress up a leprechaun statue for the town's yearly contest. They leave it out on the porch overnight, but the next morning, it's missing And theirs...