A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.

"A group of kids discovers they were cloned from the DNA of some of the greatest criminal masterminds in history for a sociological experiment"--

Roger Mifflin, whom we met in the author's 'Parnassus on wheels, ' here keeps a secondhand bookshop in Brooklyn, N.Y. He takes in the young daughter of a friend to learn the book trade, and immediately a mystery develops.

After unscrupulous collector S. Wendell Palamino cons him out of a valuable baseball card, sixth-grader Griffin Bing puts together a band of misfits to break into Palomino's heavily guarded store and steal the card back, planning to use the money to finance his father's failing invention, the SmartPick fruit picker.

When a mysterious letter written in code arrives at King's house for his human, Kayla, he follows the trail of the person who left it.

Thirteen-year-old Sammy's penchant for speaking her mind gets her in trouble when she involves herself in the investigation of a robbery at the "seedy" hotel across the street from the seniors' building where she is living with her grandmother.

As the race to find the 39 Clues builds to its explosive finish, Amy and Dan must explore an ancient culture and steal a Clue guarded by thousands of the world's best-trained soldiers. It's the most dangerous Clue search yet ... and it may mean the end for Amy and Dan.

Fourteen-year-old Nick and his brother, an ineffectual private detective, try to prevent the threatened murder of an international pop star in London at Christmas time.

When Father Higgins disappears, Johnny Dixon and Professor Childermass discover disturbing clues which lead them to England and an encounter with a long-dead knight.

"A ton of copycat gossip apps have popped up since Simon died, but in the year since the Bayview four were cleared of his shocking death, no one's been able to fill the gossip void quite like he could. The problem is no one has the facts. Until now. This time it's not an app, though-it's a game. Truth or Dare. Phoebe's the first target. If you choose not to play, it's a truth. And hers is dark. Then comes Maeve and she should know better-always choose...