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 tracks in the snow, he's sure of it. His twin, Brian, and friends Lucy and Nate aren't so certain. But then Lucy's cousin Dink, the twins' brother Josh, and Nate's sister Ruth Rose all disappear. Are there really aliens in Green Lawn? And where could they be taking Dink, Josh, and Ruth Rose? Parents, teachers, and librarians agree that these highly collectible chapter books are perfect for emerging readers and any kid who love mysteries!

From the author of A to Z Mysteries comes a springtime egg hunt mystery featuring the younger siblings of the A to Z Mysteries kids! 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! April is for Adventure... In the fourth book of the Calendar Mysteries—an early chapter book mystery series—it's springtime in Green Lawn, and Bradley, Brian, Lucy, and Nate are on an Easter egg hunt. They search high and law and find lots of eggs. But soon it's clear that some of the eggs aren't just well hidden. They're gone! Who would steal Easter eggs? It's up to the four kids to crack this eggs-cellent case. Parents, teachers, and librarians agree that these highly collectible chapter books are perfect for emerging readers and any kid who loves mysteries!

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 out. What's happening to them? Ghosts and witches and ogres aren't real . . . right?

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 isn't the only one. All over town, leprechauns are disappearing. Who is behind the mischief? It will take four kids and the luck of the Irish to find out. Parents, teachers, and librarians agree that these highly collectible chapter books are perfect for emerging readers and any kid who loves mysteries!

When an anonymous valentine draws his class's attention to a pet rabbit hidden in the closet, Bradley enlists his friends to discover the identity of the animal's owner, a situation that becomes urgent when the rabbit falls ill. Simultaneous.

Bradley and Brian's new neighbors are up to something! They've built a tall fence in their backyard. They've covered the old hollow tree with a mysterious tarp. They even have a huge, scary dog to guard it. Bradley, Brian, Nate, and Lucy are dying to know what the sneaky couple is hiding. And on the night before Thanksgiving, they're going to find out!

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! February is for Friend... In the second book of the Calendar Mysteries—an early chapter book mystery series —it's a Valentine's Day party! Bradley is passing out his class's valentines, but one of them has no name on it. Inside, the card tells the class to look in the closet. When they open the closet door, the kids find a rabbit named Douglas in a cage! What mysterious "friend" left him there? And why? Then the bunny gets sick. It's up to Bradley, Brian, Lucy, and Nate to track down his owner and figure out what is wrong with poor little Douglas. Parents, teachers, and librarians agree that these highly collectible chapter books are perfect for emerging readers and any kid who love mysteries!

Someone has been stealing and leaving behind little green sneakers, so Bradley, Brian, Nate, and Lucy trail their new teacher, who wears the same shoes in normal size.

After finding an unusual present--a lost puppy--on Christmas Eve, best friends Bradley, Brian, Nate, and Lucy scramble to find its owner before morning.