Before Jake’s grandfather died, he was on the trail of a centuries-old mystery. And he has entrusted that mystery to Jake, leaving behind a set of hidden codes, riddles, maps, and other clues that lead Jake and his friends on a scavenger hunt into the heart of Colorado’s wild and rugged Rocky Mountain National Park.

When Stella and her younger brother, Tom, move to their new London home, they become mystified by the disappearances of Harry, their elderly neighbor's small dog. Where does he go? And why does he keep reappearing wet-through? Their quest to solve the riddle over the summer holidays leads to a boat buried under a grassy mound, and a tunnel that takes them to a secret lake.

On May 1, 1915, with WWI entering its tenth month, a luxury ocean liner as richly appointed as an English country house sailed out of New York, bound for Liverpool, carrying a record number of children and infants. The passengers were surprisingly at ease, even though Germany had declared the seas around Britain to be a war zone. For months, German U-boats had brought terror to the North Atlantic.

Twelve-year-old Paris Pan has moved to a small town where she has a real shot at making friends. But that friendship comes at a price. She must take the dare, something that caused a girl to disappear on the very property she now resides. To make matters worse, Paris must play basketball against her will, eradicate a crush on the least desirable boy in seventh grade, and cope with a family crisis that was possibly caused by a chili dog.

Lucy Callahan was struck by lightning. She doesn't remember it, but it changed her life forever. The zap gave her genius-level math skills, and ever since, Lucy has been homeschooled. Now, at 12 years old, she's technically ready for college. She just has to pass 1 more test--middle school!

Eleven-year-old Charlie Reese has been making the same secret wish every day since fourth grade. But when she is sent to the Blue Ridge Mountains of North Carolina to live with family she barely knows, it seems unlikely that her wish will ever come true. That is until she meets Wishbone, a skinny stray dog who captures her heart, and Howard, a neighbor boy who proves surprising in lots of ways. Suddenly Charlie is in serious danger of discovering that what she thought she wanted may not be what she needs at all.

Living in the luxurious Arcanum building—with its interior balconies perfect for playing tag, an elevator like an iron birdcage, and quirky neighbors behind every apartment door—has always been fun and games for twelve-year-old Minerva Keen…until her neighbors start getting poisoned. Anyone could be next, and everyone is a suspect, including Minerva herself. To clear her name and help the police crack the case, Minerva starts her own detective club.

US President Keegan Barrett has swept into office on his success as Director of the CIA. Six months into his first term, he devises a clandestine power grab with deadly consequences. Barrett personally orders CIA agents Liam Grey and Noa Himel to execute his plan, but their loyalties are divided. The CIA serves at the pleasure of the president, yet they’ve sworn to support and defend the Constitution of the United States against all enemies, foreign and domestic. When the threat comes directly from the Oval Office, that’s where the blowback begins.

When 10-year-old Derek and 8-year-old Sam move with their family to Virginia, they have no idea what adventures the summer will bring. As the brothers explore their creaky old house and the deep surrounding woods, they uncover a 60-year-old mystery of a valuable coin collection stolen from the local museum.

Emerson Knight is introverted and eccentric and has little to no sense of social etiquette. Good thing he's also brilliant, rich, and (some people might say) handsome, or he'd probably be homeless. Riley Moon has just graduated from Harvard Business and Harvard Law. Her aggressive Texas spitfire attitude has helped her land her dream job as a junior analyst with megabank Blane-Grunwald. At least Riley Moon thought it was her dream job, until she is given her first assignment: babysitting Emerson Knight.

The last thing Kaylee wants to do is participate in a childish scavenger hunt - especially inside the abandoned retirement home on the edge of town. When she finds a bruised, deaf boy hiding inside one of the rooms, she vows to lead him to safety - only to discover the front doors are now padlocked, and her friends are nowhere to be found. Kaylee is about to learn that not everything that goes "bump in the night" is imaginary, and sometimes there are worse things to fear than ghosts.

Rex Walker always wanted to be like his father: a daring, adventurous man, traveling the world in pursuit of mysterious relics. While teaching anthropology at a Boston college, Rex attempts to bury the past, until he discovers a hidden clue he can’t ignore. With the help of a former student, he teams up with an alien-obsessed billionaire, and they search for the fabled Bridge. As an unidentified object nears Pluto, speculation surges. Some hail it as the homecoming of a distant alien race, and this cult is unwavering in their efforts to usher our world into a new era.

Eve and Maggie Abbott are desperate. Out of money, and options, they are forced to move into one very old house. It happens to have belonged to their dead grandmother, but the rent is cheap, and the location is killer. That last sentence is a joke, unless you're into a "middle of nowhere" vibe - and cows.

No one likes Jack. His wife is gone and his neighbors avoid him. He's a recluse and a creep, and that's just the way he wants it; he can ignore what they say behind his back if they leave him to his work and his daily walks. But when ten-year-old Emma goes missing in the nearby woods, the eyes of his neighbors turn toward him, their fear and accusations escalating as the days go by. Jack proclaims his innocence, but what the neighbors - and the listener - find out is the last thing anyone would suspect.

Ever come across a situation that simply wasn't right - where someone was getting the dirty end of the stick and you wished you could make things right but didn't know how? Fourteen-year-old Jack knows how. Or rather he's learning how. He's discovering that he has a knack for fixing things. Not bikes or toys or appliances - situations...It all starts when Jack and his best friends, Weezy and Eddie, discover a rotting corpse - the victim of ritual murder - in the fabled New Jersey Pine Barrens. Beside the body is an ancient artifact carved with strange designs.