Bradley, Brian, Nate, and Lucy follow clues to find whoever left a rabbit in their first-grade classroom on Valentine's Day, because they are worried the rabbit will get sick and die of loneliness.

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!
January is for Joker...
 
In the first book of the Calendar Mysteries—an early chapter book mystery series—Green Lawn has a problem! When Bradley Pinto wakes up in the night to strange lights in his backyard, he wonders if there are aliens in town. When he sees three-toed

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January Joker
When Bradley wakes up in the night to strange lights in his backyard, he wonders if there are aliens in town. His twin, Brian, and friends Lucy and Nate aren’t so certain. But then some kids disappear. Are there really aliens in Green Lawn?

February Friend
Bradley is passing out his class’s valentines, but one of the cards tells the class to look in the closet. Inside they find a rabbit! Then...

Bradley and Brian need help from Nate and Lucy after a hypnotist turns their mother into a duck but does not quite get her changed back.

In the tenth book of the Calendar Mysteries, an early chapter-book mystery series featuring the younger siblings of the A to Z Mysteries detectives, there's a haunted house in Green Lawn! It's Halloween, and the Shangri-la Hotel has been transformed into a haunted house, complete with an ogre out front. Bradley, Brian, Nate, and Lucy are ready for some scary fun, but then they notice that none of the kids who have gone in the hotel have come back...

It's a mystery every month from popular A to Z Mysteries author Ron Roy!
July is for Jitters: In the seventh audiobook of the Calendar Mysteries - an early chapter book mystery series featuring the younger siblings of the A to Z Mysteries detectives - the mayor is having a special Fourth of July contest; the person whose pet has the best Independence Day costume gets to be mayor for a day! Bradly, Brian, Nate, and Lucy transform...

It’s a mystery every month from A to Z Mysteries author Ron Roy!
 
Who knew there were thirteen months in a year? It’s an extra thirteenth book of the Calendar Mysteries! Bradley, Brian, Nate, and Lucy are looking forward to a New Year’s Eve party. But someone is leaving clues that there might be more to this celebration than confetti and noisemakers. The year ends with a surprise in this exciting conclusion to...