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Clem and her friends Ash and Zara are members of the Thames and Tide Club! Every weekend they go mudlarking by the river, searching for treasures that have washed up on the shore. Clem has found old things, new things and a whole heap of rubbish. But one day, she finds something really special. Something magical that belongs in the river and must be returned to its rightful owner…or else. Before they know it, the Thames and Tide Club are on the weirdest, wildest underwater-iest adventure they could possibly have imagined on a mission to save Underwater London!

When the Morrow twins, Merry and Spike, arrive at dusty old Fox House, they think spending their holidays there is going to be dull. But they soon discover that there are secrets to the old house. A missing woman, a baby left on the doorstep, a locked study; as the mysteries pile up, the girls begin to investigate. The twins also have a secret of their own: they can stop time. What happened in this old house? And can their strange powers help them solve a decades-old crime?

Has our crime-fighting hero finally met his match? The evil Professor Moriarty seems able to guess his every move. As Holmes closes in on his arch-enemy, the two prepare to meet in a final confrontation. Who is going to win?

While riding in their homemade iceboat on the frozen surface of Barmet Bay, Frank and Joe Hardy and Chet Morton discuss their plans for the upcoming Christmas holiday break. They visit Cabin Island but a mysterious stranger chases them off the island. The boys are invited to the home of Elroy Jefferson, a man whose car they returned in The Shore Road Mystery. They overhear an argument between Jefferson, the owner of Cabin Island, and Hanleigh, who is trying to buy the island. Mr. Jefferson rewards the boys and grants them permission to use the cabin for Christmas

Timmy Failure is not just any detective - he is the greatest detective in his town, perhaps the nation. He is so famous that there have been seven books written about his life. Plus a movie. And so he has agreed to provide the world with his extraordinary origin story, as dictated to his biographer and best friend, Charles "Rollo" Tookus.

Ivy Stewart thought West Archer Academy was the first step to everything she’d always wanted. The key to her entire future. But now…she might not even have a future. It’s the start of a new semester, and Ivy’s very old friends and her very new immortality are at odds. The Evers, kids who are hundreds of years old and never age, are determined to save Ivy from suffering that same miserable fate…even if it means she won’t remember them. But what’s worse? Forgetting her family, her friends, her life or never turning thirteen?

King and Kayla are going to a sleepover at Jillian and Thor’s house. They usually sleep downstairs, but not this time. Jillian says there’s a ghost down there!

The thrilling story of a young girl who stows away onboard the Titanic and as she explores, attempting to find answers to her many questions about the ship, suddenly finds herself caught up in the desperate struggle to survive after it strikes an iceberg. Hazel Rothbury is traveling all alone from her home in England aboard the celebrated ship Titanic. Following the untimely death of her father, Hazel's mother is sending her to the US to work in a factory, so that she might send money back home to help her family make ends meet.

Bee's mom has a job in New York City for the summer, so Bee is being sent to summer camp. She's not excited about it. Being around other people is hard for her, plus she knows nothing about campfires, she's not a good swimmer and she's never even been in a canoe. When she first arrives, things go pretty much as she expected. The other girls either make fun of her or ignore her, and the woods surrounding the camp give her the creeps: she keeps hearing elusive music coming from somewhere in the distance, and there's something off about it.

Frank and Joe, the sons of famous detective Fenton Hardy, want to follow in their father's footsteps. Their first chance to solve a mystery comes when jewels and securities are stolen from the safe of the local Applegate mansion. To make matters worse, the father of one of their good friends has been charged with the crime. The lads help their father identify the thief, but the location of the stolen items remains unknown. Frank and Joe use their budding investigative skills to solve the mystery and clear the innocent man.

Aveline Jones loves reading ghost stories, so a dreary half-term becomes much more exciting when she discovers a spooky old book. Not only are the stories spine-tingling, but it once belonged to Primrose Penberthy...who vanished mysteriously, never to be seen again. Intrigued, Aveline decides to investigate Primrose's disappearance. But now someone - or something - is stirring. And it is looking for Aveline.

When Daisy Wells and Hazel Wong set up their very own secret detective agency at Deepdean School for Girls, they struggle to find any truly exciting mysteries. Little do they know that in the months that follow, mystery - and murder - will never be far away, and when Hazel discovers the Science Mistress, Miss Bell, lying dead in the Gym, the Detective Society is determined to get to the bottom of the crime. Then, soon afterwards, there's the incident at Daisy's family home, Fallingford, where a guest falls mysteriously, fatally ill.

The King of Bohemia wishes to marry...but before he can do so, he needs Sherlock's help! Can the sleuth retrieve an embarrassing photograph of the royal, before a scandal erupts and the king is forced to cancel his wedding plans?

Capitol City's Natural History Museum is haunted—or at least that's what someone wants people to think. But Wilson Kipper, son of the museum's head paleontologist, knows better. When the mysterious occurrences go from spooky to dangerous, the museum is forced to close its doors. Can Wilson and his friends get to the bottom of things, or will the Natural History Museum be closed for good?

Los palos de Vicky, la campeona de golf, han desaparecido. Este es un caso para el famoso detective privado de Ciudad Amable Sabueso Orejotas y su ayudante, el gato Floro. La escritora Luisa Villar Liébana regresa con otro de sus famosos detectives, tan perspicaz e inteligente como la gallina Cloti, y una historia de suspense que defiende la justicia. Esta nueva aventura de Sabueso Orejotas hará las delicias de los más jóvenes amantes del misterio y las historias policiacas.

Un misterioso ladrón está robando los tesoros de Ciudad Amable y solo el Sabueso Orejotas, el investigador privado más famoso de toda la ciudad, y su ayudante, el gato Floro, pueden descubrir quién se esconde detrás de los delitos y hacer triunfar la verdad y la justicia. Luisa Villar Liébana regresa con otro de sus famosos detectives, tan perspicaz e inteligente como la gallina Cloti, y un enigma que hará las delicias de los más jóvenes amantes del misterio y las historias policiacas.

Tori, Marvin, and Noah would rather be anywhere else than on the seventh-grade class field trip to Raven Island prison. Tori would rather be on the soccer field, but her bad grades have benched her until further notice; Marvin would rather be at the first day of a film festival with his best friend, Kevin; and Noah isn't looking forward to having to make small talk with his classmates at this new school.

Richard Hsieh's life is about to become a total nightmare. His dad studies dreams and they hook his new Slappy doll up to the dream machine as a joke. All of a sudden, Richard's dreams are becoming scarier and scarier. Each time, seeing Slappy, his birthday present, come to life and wreak havoc. But they're only dreams, right?

In the first book of the Capital Mysteries—an early chapter book mystery series featuring fun facts and famous sites from Washington, D.C.—KC Corcoran always watches the news. So it's no surprise that she notices right away when the President of the United States starts acting funny on TV.

In the tenth book of the Capital Mysteries—an early chapter book mystery series featuring fun facts and famous sites from Washington, D.C.—KC and her best friend, Marshall, wake up to a trick not a treat the morning after the White House Halloween costume party. With the presidential election only a week away, someone has posted damaging photos of the president on the Internet, photos that were digitally doctored! Will they ruin President Thornton's chances for a second term? Or can KC and Marshall rescue the election?