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Why would anyone steal an old hunk of junk? Ralphie Jordan loves his beat-up bike, Old Rusty. The tires are bent, spokes are missing, and the chain keeps falling off. But Ralphie wouldn't trade it for any other. Then Old Rusty goes missing just outside the library, and Ralphie is devastated. It's up to Jigsaw and Mila to find out who stole it - and the thief may be closer than anyone would have guessed!

Got a mystery to solve? Jigsaw Jones is on the case. Anything that ever goes missing or lost, Jigsaw and his partner, Mila, can find. Then, during a magic show, they watch a toy dinosaur disappear, right in front of their eyes! Even the magician can't seem to bring it back. Luckily Jigsaw doesn't believe in magic, and he's determined to find that dinosaur!

In Robo-Dodo Rumble, Koko Dodo's cookie shop is facing some stiff competition from an evil robotic dodo (a Robo Dodo). The Robo Dodo is selling its cookies for only a penny! Why? To put Koko's shop out of business! And if that weren't bad enough, a giant sea monster starts destroying the town! But don't worry. Didi Dodo has a daring plan.

Didi Dodo, the heroic spy, and Koko Dodo, the cookie chef, are off to solve another kooky caper! In Double-O Dodo, Koko has a big problem: His trusty assistant, the Queen, has been kidnapped! Over a frantic phone call, she tells Koko that she’s been kidnapped by a human, which is preposterous - everyone knows that humans aren’t real! Luckily, Didi is on the case. Her plan: To go undercover at the Humanland amusement park to find the Queen.

The audio edition of the best-selling middle grade novel about a spunky girl born without arms and a boy with Tourette syndrome navigating the challenges of middle school, disability, and friendship - all while solving a mystery in a western theme park. Aven Green loves to tell people that she lost her arms in an alligator wrestling match, or a wildfire in Tanzania, but the truth is that she was born without them.

In the sixth book in the number-one best-selling Alex Rider series by Anthony Horowitz, teenage spy Alex has a chance encounter with the son of multi-billionaire Nikolei Drevin. Soon Alex finds himself in the middle of an international crime hunt. The connection - Ark Angel, a revolutionary space hotel with catastrophic potential.

Florian is 12 years old and has just moved to Washington. He's learning his way around using TOAST, which stands for the Theory of All Small Things. It's a technique he invented to solve life's little mysteries. But when he teaches it to his new friend Margaret, they uncover a mystery that isn't little. In fact, it's huge, and it involves the National Gallery, the FBI, and a notorious crime syndicate known as EEL. Can Florian decipher the clues and finish his homework in time to help the FBI solve the case?

When Nick and Tesla Holt are sent to live with their eccentric Uncle Newt, they find their new neighborhood is full of secrets. What the heck is going on? To unravel the mysteries (and save their skins), Nick and Tesla must use everyday household objects to build electromagnets, rocket launchers, and other crazy contraptions.

Jimmy Stoker's dreams have been full of tigers since he started his Saturday job at the zoo. Boris, the great Siberian tiger, has died and rumours abound about what's going to happen to him now. Jimmy hears that someone wants to steal Boris's bones, because tiger bones reputedly have healing powers and fetch a lot of money on the black market. So when he sees the tiger being smuggled out of the zoo, he fears the worst. With the help of his schoolmate Billy and his old friend Major Gregory, Jimmy is determined to investigate.

Twelve-year-old Amy knows there's some connection between Aunt Claire's old dollhouse in her great-grandparents' attic and a deadly family secret from years ago. Aunt Claire seems upset about the dollhouse, which is a replica of the house they're in, but she's not talking.

Olivia Sharp, cousin to super sleuth Nate the Great, is a detective too! Rather than solve mysteries like Nate, Olivia helps friends with their problems by detecting what's wrong beneath the surface. You'll be won over by Olivia's spunk, eccentricities, and can-do spirit. Olivia Sharp is one smart agent for secrets - which means she knows how to read between the lines. Olivia's best friend, Taffy Plimpton, has a problem. Taffy wants to join a secret club, but its members won't let her in. Why not? It's a secret that Olivia is determined to find out!

All aboard the Owl Express! Nate, the great detective, and his dog Sludge, hit the rails on their latest case. Their mission: To guard an owl named Hoot. Hoot belongs to Nate’s cousin, Olivia Sharp, and she thinks someone on the train might be out to get her feathered friend. But whooo? Sludge keeps an eye on the owl’s cage while Nate snoops for clues. Then Hoot disappears! With many suspects to question, and many places to look, Nate knows one thing for sure - being the bodyguard to a little bird is a lot more work than he ever imagined!

These audiobooks introduce young listeners to the detective mystery genre. Perfect for the Common Core, kids can problem-solve with Nate, using logical thinking to solve mysteries! Nate the Great is about to enter his dog, Sludge, in the smartest pet contest. But when the prize disappears, it looks as if the contest will flop. It's a tough case for Nate and Sludge as they search for clues leading to the missing prize. In more ways than one, it's a very fishy business. Can Nate and Sludge find the prize in time?

Melvin's lucky fluffy dice are missing. Without them, he can't drive his bus. How will his passengers get around town? Who need so much extra luck? This sounds like a case for the High-Rise Private Eyes - Case #006, to be exact, the case of the fidgety fox.

While enjoying a summer day boating on Barmet Bay, Frank and Joe end up saving Mary Todd from downing. She was on her way to see their father, Fenton Hardy about the mysterious disappearance of her brother. While Fenton Hardy went to search for him, Frank and Joe discovered a few small details about the missing professor. Fenton Hardy returned after his unsuccessful search as the boys were heading to a camping trip with Chet and Biff to Honeycomb Caves.

Katie Woo and Pedro are hot on the trail of a treasure map. But as it catches in the breeze, it keeps disappearing on them. Will they be able to nab the map and will it lead them to real treasure?

The Bailey School Kids need to do a report on England. Howie picks Camelot as his topic, which is how he knows the new assistant at the library, Mr. Merle, looks just like the ancient wizard Merlin! The kids discover a crystal ball in Mr. Merle's office and learn that he has a huge goldfish named Arthur, just like the ancient king. Then Mr. Merle transforms the library into a medieval castle and starts mesmerizing kids with the magic of reading! Something strange is definitely going on. Could Mr. Merle really be a wizard?

Middle school is hard. Solving cases for the FBI is even harder. Doing both at the same time - well that's just crazy. But that doesn't stop Florian Bates! After helping the FBI solve an art theft at the National Gallery and uncovering a DC spy ring, Florian's finding life at Alice Deal Middle School a little boring. But that's all about to change! His FBI handler, Marcus, has a job for him! Is it a bank robbery? Counterfeit ring? International espionage? Actually it's middle school pranks...

Many people go their whole lives without noticing anything that is afoot, amiss, or even untoward; without ever experiencing that toe-tingling, stomach-twisting sensation that a mystery is about to unfold. Not Bonnie Montgomery—the world's best detective. Not that anyone (other than Grampa Banks) has heard of her… But they might have heard of the great Montgomery Bonbon, the well-dressed gentleman detective who (apart from the hat and moustache) looks suspiciously like a 10-year-old girl.

After an escaped kangaroo starts a fire that burns down his house, Teddy Fitzroy accepts an invitation to go to Malibu with his girlfriend, Summer, and her mother, Kandace. He’s hoping to spend some time relaxing on the beach, but wherever Teddy goes, trouble isn’t far behind. First, a massive dead whale has washed up on the beach—and before anyone can determine what killed it, it explodes. Doc, the head vet from FunJungle, suspects something fishy is going on and ropes Teddy and Summer into helping him investigate.