One morning, Ben finds an envelope containing a very special invitation to come and see the Gee Museum -- a dusty old place under threat of closure. However, once inside he discovers all sorts of incredible things like talking owls, dancing bees, magical bottles, witches, and of course, a hippo at the end of the hall. But most importantly he discovers a connection to his father and the family he never even knew he had. And now he has something important...

Fourteen-year-old Amy Cahill and her younger brother Dan thought they could return to their regular lives when they found the 39 clues. But the Vespers, powerful enemies, will stop at nothing to get the clues. And with the Vespers rising, the world is in jeopardy.

Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair. Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded.

'Seven years ago, the Ballastian sisters' parents left them in the magical Straygarden Place, a house surrounded by tall silver grass and floating trees. They left behind a warning saying never to leave the house or go into the grass. "Wait for us," the note read. "Sleep darkly." Ever since then, the house itself has taken care of Winnow, Mayhap, and Pavonine--feeding them, clothing them, even keeping them company--while the girls have waited and...

Alex, Alice and Alistair think they are just three ordinary mice, until Alistair mysteriously vanishes. Then Alex and Alice learn a secret about their family: a secret which means Alistair's life is in danger - unless Alex and Alice can find him first. So begins a hair-raising journey.

Throughout the hunt for the 39 Clues, Amy and Dan Cahill have uncovered history's greatest mysteries and their family's deadliest secrets. But are they ready to face the truth about the Cahills and the key to their unmatched power? After a whirlwind race that's taken them across five continents, Amy and Dan face the most the difficult challenge yet -- a task no Cahill dared to imagine. When faced with a choice that could change the future of the world,...

For Arlo Finch and the Rangers of Pine Mountain Company, summer camp is more than canoeing and hiking. It's also a chance to search for ancient forest spirits and discover mysterious messages encoded in tree bark. But when Arlo and his best friends Indra and Wu stumble upon clues about the long-lost Yellow Patrol, Arlo uncovers a stunning history that leads right back to his very own family.

"Nora and Ben's younger sister Birdy loves to keep secrets ... One day Birdy watches her mother spit into a tube, ready to send it off to find out more about herself ... Birdy spits into a tube, too, when no one sees her. But when the test results come back, they are a surprise. Birdy is seemingly not related to Nora and Ben's parents. But if she is adopted, how could that have happened without the children knowing?"--

Seven siblings are forced by the destruction of their swamp home to move into their grandpa's mansion, but greedy neighbors plot to steal their secrets and place them in homes far away from each other.