"Thirteen-year-old twins Hope and Gordon enter a spelling bee in a last-ditch effort to save their family from financial ruin, only to find themselves in a cut-throat competition to uncover a fortune and dark secrets about the wealthy relations they have never known."--

A million dollars, or a clue? Police report a break-in at an elite hotel, and the suspects sound suspiciously like Amy and Dan. There's a car and speedboat chase and an angry mob! When there's a clue on the line, anything can happen.

"For years, Miranda has stared at postcards of August Isle, Florida. The town where her mother spent her summers as a girl. The town that Miranda has always ached to visit. She just never wanted it to happen this way. When she arrives on the Isle, alone and uncertain, to stay the summer with an old friend of her mother's, Miranda discovers a place even more perfect than she imagined. And she finds a new friend in Sammy, “Aunt” Clare's daughter....

"Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair Oh. Could they have been foolish enough to make an alliance? 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 . . . and the price to uncover them just might be lethal."--Publisher.

To help her best friend-turned-enemy Derek, who's possessed by a ghost, seventeen-year-old Aria must reestablish her link to the afterlife with the help of a new love to remove the lost soul from Derek's body or they could lose him forever.

Ivy Sparrow and her big brother Seb discover a city beneath London where ordinary objects have magical powers.

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,...

The Greystone kids thought they knew. Chess has always been the protector over his younger siblings, Emma loves math, and Finn does what Finn does best--acting silly and being adored. They've been a happy family, just the three of them and their mom. But everything changes when reports of three kidnapped children reach the Greystone kids, and they're shocked by the startling similarities between themselves and these complete strangers. The other kids...

"Sara Zarr, author of the National Book Award finalist Story of a Girl, returns with an intimate, exquisitely crafted novel of the courage it takes to see those we love for who they are."--Provided by publisher.

"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?"--