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Djuna and his dog, Champ, go to Stony Harbor to spend what he thinks will be a quiet and uneventful holiday in a seaside village. But little does Djuna know what is in store! First he meets Billy Reckless and his dog, Alberto. Then there's the mystery that enshrouds Djuna's aunt, Patty. Things begin to happen! Djuna has a grand time with his newfound friend, lobstering, sailing, and exploring, until Aunt Patty's motorboat, the Patagonia, mysteriously disappears.

When those two enthusiastic fishermen, Djuna and his friend, Tommy, are offered a chance to spend the summer at fish-filled Silver Lake as the guests of Miss Annie Ellery, they are overjoyed. But great as the fishing proves to be, there is more in store: Silver Lake holds a mystery, and the boys find themselves swept up in a series of exciting and dangerous adventures, including an abandoned icehouse and two fires, as they help to solve it.

After trapping Mr. Anarchy, the evil master griefer who's been tormenting them, Lily, Simon, and Michael can finally concentrate on trying to escape the Overworld and getting to know their new friends on the server. So when one of their friends invites them along on a treasure hunt, they couldn't be more thrilled! But when the gang's absence from Lisimi Village gives Mr. Anarchy a chance to escape, their hunt for treasure is cut short and Lily, Simon, and Michael must make a hard decision.

Jigsaw Jones is back! In The Case from Outer Space, an original mystery from James Preller, Jigsaw and his crew - Mila, Joey, and Danika - find a clue that implies an alien may be about to visit their school! Can it be true? And what does the Little Free Library have that aliens from outer space might want? (Hint: The school librarian has invited a special guest to talk about space exploration - an astronaut!) 

Only Joey Pignattano would agree to eat a worm in exchange for a dollar. Problem is, he doesn't trust Bobby Solofsky to hold up his end of the deal. So he's hired Jigsaw Jones and Mila Yeh to make sure Bobby keeps his word. But when the worm goes missing and the primary suspect is a mummy - on Halloween of all days! - Jigsaw Jones is the only one who can solve the case! 

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! 

Reggie Armitage the III has found a box with a list of codes and a golden skeleton key - but he has no idea what the key opens or how to crack the code. It's a good thing second-grade sleuths, Jigsaw Jones and Mila Yeh, are investigating The Case of the Golden Key. 

It's the biggest - okay the most stressful - night of the year.... Parents' Night! And Geetha Nair's painting has just gone missing. The stakes are high, but Jigsaw Jones and Mila Yeh have never encountered a mystery they couldn't solve. Can they track down their friend's art in time for the most important show of the year in The Case of the Vanishing Painting? 

Bertie Bradshaw never set out to become a spy. He never imagined traipsing around war-torn London, solving ciphers, practicing surveillance, and searching for a traitor to the Allied forces. He certainly never expected that a strong-willed American girl named Eleanor would play Watson to his Holmes (or Holmes to his Watson, depending on who you ask). But when a young woman goes missing, leaving behind a coded notebook, Bertie is determined to solve the mystery. 

In the exciting follow-up to The Nebula Secret in the seven-book Explorer Academy series, Cruz, Sailor, and Emmett, along with their new ally Bryndis, embark on their first globe-trotting mission aboard the ship Orion. Cruz jumps right back into school and starts using the latest technology in submersible underwater dives, but is soon reminded of the dangers of exploration when his equipment fails and he almost drowns. Determined to keep his eyes on the prize, Cruz sneaks away to try to find answers, but unknowingly lures his friends into bigger trouble. 

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.

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....

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?

England is in trouble! A priceless violin has been stolen, and there's only one person who can help: Mac B., kid spy. Mac's adventure takes him on a top-secret museum night watch, zip-lining in Italy with his trusty corgi sidekick, and on an undercover mission in the heart of enemy territory. But when he ends up as a captured prisoner, is the mission lost for good?

When the Crown Jewels go missing from inside a locked room, Mac's spy skills are put to the test. How did the thief break in? Where did the jewels go? And will Mac be able to solve this locked-room mystery before the thief escapes? This mystery isn't just a whodunit...it's a howdunit! The action in this adventure is nonstop as Mac travels to an ancient Irish castle to solve the mystery. There, he encounters everything from killer king cobras to bizarre ice sculptures...and even a revenge plot dating back hundreds of years! Will you be able to solve the mystery before Mac does?

The precious Crown Jewels have been stolen, and there's only one person who can help the Queen: her newest secret agent, Mac B. To help her, he must travel around the globe in search of the stolen treasure...but will he find it in time? From secret identities to Karate hijinks, this fast-paced, witty, and historically inspired chapter book will keep listeners guessing. With fascinating historical facts masterfully sprinkled throughout, the first entry in this series offers adventure, intrigue, absurdity, and humor.

Eleven-year-old math prodigy Ada Lovelace, daughter of the famous and infamous poet Lord Byron, is a genius. Isolated, awkward and socially inept - but a genius. Mary Godwin, age 14, daughter of radical philosopher William Godwin and feminist writer Mary Wollstonecraft, is a romantic. It has been arranged for Mary and Ada to be tutored by the young man who calls himself Percy B. Snagsby, a nervous fellow who may or may not be a spy.

Winner of the Book of the Year, Children's Fiction at The British Book Awards, 2021 'Like Murder on the Orient Express but better . . . a terrific read!' – Frank Cottrell Boyce, author of Millions Adventures on Trains is a major mystery series from bestselling authors M.G. Leonard and Sam...

In the eighth book in the number-one best-selling Alex Rider series by Anthony Horowitz, Alex meets international do-gooder Desmond McCain. But a simple card game between them rapidly leads to a duel to the death - one that could result in the destruction of an entire country. 

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.

In the second book in the number-one best-selling Alex Rider series by Anthony Horowitz, teenage spy Alex is sent by MI6 to infiltrate the exclusive Point Blanc Academy. But the academy hides a deadly secret. Can Alex alert the world to the truth before it’s too late? 

In solving the mystery of the Last Chance Hotel, Seth has discovered a bewildering new world of magic. Swept up in the new MagiCon case investigating ghostly goings-on at the remote Snakesmouth Lighthouse, he is determined to prove himself. But when eccentric owner Mina Mintencress is murdered, Seth realizes danger lurks around every corner. With the help of his cat, Nightshade, Seth must put his newfound magic to the test. Can they unmask a sinister sorcerer...before it's too late?  

September, 1939. When Jimmy is evacuated to a small village in Wales, it couldn’t be more different from London. Green, quiet and full of strangers, he instantly feels out of place. But then he finds a skull hidden in a tree, and suddenly the valley is more frightening than the war. Who can Jimmy trust? His brother is too little; his best friend has changed. Finding an ally in someone he never expects, they set out together to uncover the secrets that lie with the skull. What they discover will change Jimmy - and the village - forever.

What is the connection of "Fowl Relief" and an English golf-playing king? Does the nickname of Jimmy Douglas' great-great-grandfather have any significance? Tie these answers with the other clues and the mystery of the purple bird is solved, but not until Djuna, the brilliant young sleuth, and his pal Jimmy go through an ordeal that almost takes their lives. The boys tangle with an antique dealer and a tiger-skin diary - just to name a few of the events - in their struggle to solve the mystery.

"Katal!" The black bird repeated the two syllables again and again. "Katal! Katal!" As Gulliver Queen seeks out the meaning of the strange word, he is drawn into the world of international diplomacy - and dangerous espionage! As he follows the trail of clues, Gully acquires two friends from India who aid him in the search for a missing embassy guard.

Gulliver Queen, nephew of the famous detective, Ellery Queen, doesn't want to be a detective. But when Gully and his new friend, Fisty Jones, investigate the strange underwater noises in the Hudson River, they suddenly find themselves deep in a mystery that Gully can't resist tackling. The menacing tattooed man, the weird one-eyed figure in the abandoned building, the strange but merry Magnus Merlin, magician extraordinaire - all add up to an exciting tale of danger and suspense on and under New York's waterfront.

Mysteries have a way of finding Djuna, and this time a missing page from an old ship's log and the dead captain's haunted house start the ball rolling. Djuna has learned that Captain Beekman brought a treasure from his whaling trips. Who can have an interest in letting the boy get lost? Was Djuna close to the answer of the mystery?

In The Yellow Cat Mystery, amateur sleuth Djuna visits his friend, Tommy, in Florida. His yellow cat has a sore tooth, and they set off to see the dentist. The dentist is new to the town and doesn't seem to be able to help them. They do, however, notice two persons who came from a mysterious black-lacquered ship at sea - and a normal day suddenly becomes an unusual adventure.

Free passes to the circus seemed pretty exiting to Djuna and his friend, Tommy Williams, and things promised to be even more exiting when they met their old friends, Socker and Cannonball, at the entrance gate, but they were only the start of a hair-raising experience. The boys soon learned that the newspaper reporter and the state trooper were trying to uncover a pack of tricksters who were cheating the circus audiences.

Djuna and Ben weren't sure they believed in ghosts. The little girl who opened the door of the haunted house didn't look like a ghost, yet she vanished into thin air. They had to find out what happened to her. And they had to rescue Waterbury, the time-telling turtle who walked into the deserted house - and didn't walk out. Djuna found clues, and he added them all up to solve a case the secret service couldn't crack!