Children Chapter Mystery

Third grader and inventor extraordinaire Ada Lace likes nothing more than to tinker with mechanics like her robot, George. Her latest project is to fix up a ham radio, something that she could use to contact people on this planet...and beyond. The only problem is that she just can't get it to work properly. During a sleepover, Ada's best friend, Nina, hears something strange coming from the radio in the middle of the night. A distant voice says, "Release the swarm!" convincing Nina that aliens are about to invade planet Earth.

They’re explosive and invisible. They’re extinct and never-ending. What are they? Science mysteries, of course! Get ready to crack the cases and the real science info wide open. You might need your goggles for this one.

It is five days until Christmas, and Winston has a Very Curious Mystery to solve. He has hazy rememberings of another mouse, and he just knows that someone very important to him is lost. After promising Oliver that he will be back in time for Christmas, no matter what, Winston sets out on an exciting round-the-world adventure to find the missing mouse, helped along the way by wonderful old friends and delightful new ones, too.

Miss Lila Greer announces it’s time for Grade Two to get a class pet, and she wants the kids to participate in choosing which one. After all, they will all have to share the responsibility of caring for it. The class narrows it down to two options: Team Turtle and Team Bird. Sofia is named Election Commissioner, in charge of overseeing a fair and honest election between the two teams. There’s a class-wide campaign, complete with posters, articles, and speeches. Then it’s time for the election! But when the votes are counted, there’s a tie, and one vote is missing.

Underneath the steps leading down to Eric's basement is a hidden storage place. It's dusty and old, nothing special at all. But when Eric, Julie, and Neal all huddle inside the gray room together, something unbelievable happens. A glittering light and then a rainbow-colored staircase appear. As the kids take their very first step down into the mysterious land of Droon, they know that only magic and adventure await them!

Is there a real Headless Horseman haunting Sleepy Hollow? Dink, Josh, and Ruth Rose will sleep in a cabin, take a haunted hayride, and go to a party near an old graveyard. But strange things start happening that don’t seem to be part of the spooky fun. Has the famous ghost story come to life?

There's a new guidance counselor at Bailey Elementary School and he's giving the kids the creeps. No one understands why his skin is so pale, why he hides from the sun, or why his skin is deathly cold to the touch. But Counselor Drake couldn't really be Count Dracula, could he?

Beware of avalanches! When the magic tree house whisks Jack and Annie back in time to the highest pass in the Swiss Alps, they discover an ancient monastery filled with monks and Saint Bernard dogs. Annie can’t resist offering to train a wild young dog named Barry, but he is quite the handful! Before the night is over, Jack and Annie will be forced to use some crazy magic!

Spread some Christmas cheer with Nate the Great in this holiday adventure! Young listeners are introduced to the detective mystery genre, perfect for the Common Core. Kids can problem-solve with Nate, using logical thinking to solve mysteries! Annie's dog is unhappy. When Fang is unhappy, everyone is unhappy. Especially Nate the Great. So Nate agrees to sniff out Fang's mysteriously missing Christmas mail. It's cold and snowy. But Nate the Great and his dog, Sludge, will try to solve this holiday case in time for Fang to have a crunchy, munchy Christmas.

Dink, Josh, and Ruth Rose are excited to see Uncle Warren's new racehorse, Whirlaway, in action. But the night before the big race, the horse disappears! Can the kids figure it out or is Whirlaway out of the winner's circle for good?

When Stanley Lambchop is asked to help catch an art thief in Paris, he's thrilled! Posing as a painting in the Louvre museum on a wall across from the famous Mona Lisa? - c'est magnifique! But Stanley soon grows bored - until he meets Etoile, an art student who shows him around the City of Light. Then when Stanley goes back to the museum, he soon realizes that the Mona Lisa looks…different. It's been switched for a fake!

Dink, Josh, and Ruth Rose love visiting their friend Sammi, the prince of Costra. They swim, soak in the sun, and admire the bright yellow yacht that is moored just offshore. But the owners of the yacht are acting a little suspicious. And there’s suddenly been a robbery on the island. Can Dink, Josh, and Ruth Rose find out a connection between the robbery and the mysterious yellow yacht?

For budding amateur sleuths, Nancy Drew and her Clue Crew pals George and Bess are the ultimate role models. Winter has come to River Heights, and the girls are busy making a snowman—affectionately named Sherlock. They are distracted, however, by one of their classmates. It seems Deirdre has changed her name to Madame Chocolata, and she’s reading marshmallows to tell fortunes.

Nate the Great and his trusty dog, Sludge, have a tricky case to solve. Nate's friend Rosamond has started a fortune-telling business, but her money box is missing. Sludge and Nate visit Claude, who helped Rosamond set up her business, and Finley, who collects boxes for his rat. They can't seem to help! It looks like the only way to clean up this case is to get down and dirty in the dumps!

One day in the park, the Aldens’ dog, Watch, comes across a mysterious box with a note inside. “Congratulations!” the note says. “You’ve found it!” The box is part of a game called Geocaching. Soon, Henry, Jessie, Violet, and Benny are searching all over town for hidden boxes and making friends with other kids in the geocaching club. But is one of the club members a thief?

The Aldens discover there’s nothing more fun than a drive-in theater, where they can eat popcorn in the car and watch movies under the stars! But pranks and other odd things keep happening at the Diamond Drive-In, and late at night, a ghost is seen walking around the empty lot. Is the old theater really haunted?

Mac must crack a secret code that has been recovered from a double agent. A series of clues leads Mac to France and then to Japan, where he comes face-to-face with his arch-nemesis, the KGB man...and the world headquarters of Nintendo! Is the KGB Man secretly behind all of this? And are Mac's video-game skills good enough to face down his enemy at the Video Game World Championships?

Where could those wolves be? When the kids visit the Maine wilderness, they spot a white mother wolf and her babies on a cliff. But soon after that, the pups are stolen! Can Dink, Josh, and Ruth Rose sniff out the culprits?

The stakes are high - both for the past and the future. The finale of The Return series leaves the Kingdom Keepers with unimaginable choices to make.

Iggy Peck is an architect at his very core: When he's not making houses out of food, his head is up in the clouds, dreaming of design. So he's totally blown away when Ada Twist's Aunt Bernice inherits an old house from ice cream mogul Herbert Sherbert that is filled with countless rooms from all his favorite architectural periods. But something's not quite right....