When Alfie McQuinn, the notorious jewel thief, is killed on a job, his last words to his son, March, are to "find jewels" and this instruction leads the boy to Jules, the twin sister he never knew he had--and the perfect partner to carry on the family business.

Astrid and Apollo, eight-year-old Hmong American twins, embark on a papier-mâché project to create famous landmarks from Laos for the Magnificent Wonders of the World Exhibit, but encounter an unexpected problem that threatens the twins' participation. Includes Hmong words and their definitions.

On a cross-country vacation with their parents, twins Coke and Pepsi, soon to be thirteen, fend off strange assassins as they try to come to terms with their being part of a top-secret government organization known as The Genius Files.

Sharing a common nightmare about a sinister boy in an abandoned cabin, the girls in Camp Minnehaha's Bunk 9 are astonished when annoyingly well-behaved Samantha meets the boy in the woods and pursues a romance with him, inciting the jealousy of her twin, Ali.

"Max and Ruby prepare for a new baby sibling--only to find out they are getting two of them!"--

When a set of priceless paintings by Leonardo da Vinci and Rembrandt go missing in Russia, the Kidd siblings head to St. Petersburg and the wild Arctic tundra to find the bad guys and locate the treasure.

"The Poe brothers aren't ordinary boys. They're identical, inside and out. They can read each other's minds. And their fiendish pranks are legendary. But a mysterious organization is after them, and the boys are in more danger than they know. Can their famous ancestor, Edgar Allan Poe, help them from beyond the grave?"--Page [4] of cover.

Film-loving twins Joules and Kevin face new evil bunnies from outer space when odorous extraterrestrials that use "smellepathy" to control their prey's brain arrive to conquer the world.

"Lately, very strange things have been happening on Calle La Pera, 24: The Pisa Cola Gatos don't know whether to continue with the group or not, a very peculiar lady has appeared in the doorway, and everything indicates that Alberto's house has killed someone... and there's movement in 1st A, although there's no trace of tenants. But what's going on? Thank goodness Hugo and Olivia have already started to investigate!"--Adapted from back cover.

Fifteen-year-old Josh has chosen to side neither with his twin sister Sophie nor with the Alchemyst, Nicholas Flamel, but rather to fight alongside Dr. John Dee and the mysterious Virginia Dare, while the immortal Machiavelli and Billy the Kid follow the Elders' plans to set loose the monsters of Alcatraz on San Francisco and trigger the end of the human race.