aEighteen-year-old twins Becca and Cassie, now trained, fearless fighters, hold the key to defeating the despotic United regime and freeing the people of the former United States, but at what cost?

In a future world where teenagers are taken, imprisoned, and forced to fight for their survival, well-behaved Cassie will do whatever it takes to save her rebellious twin sister Becca from Death Row.

After her twin sister Anna falls to her death while sneaking out her bedroom window, high school sophomore Jess tries to learn everything she can about the sister she thought she knew and soon discovers that her twin kept many dark secrets.

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 humani race.

While true-crime afficionado Ellery and her twin brother are staying with their grandmother in a Vermont community known for murder, a new friend goes missing and Ellery may be next.

Eighteen-year-old twins Charlene and Max Perigard have grown up under the wealthy but tyrannical rule of their oil-tycoon grandfather. When Max disappears and a ransom note shows up, Charlene's world is shattered. Fearing the worst, she determines to find her brother before it's too late. Her quest hurls her into a twisted, frigid world of snow and ice ... and leads to terror in an isolated cabin. Together the twins struggle for survival while enduring...

Seventeen-year-old Payton Brave is desperate to uncover what happened to her twin sister, who disappeared one year ago. As she begins to question everything around her, Payton becomes caught in a mystery that goes deeper than she ever imagined.

"West Finch is one hurricane away from falling into the sea, but Harlow Prout is determined to save her small Maine hometown. She needs to find someone willing to help. Her best friend Ellis MacQueen "fixes" problems by running away from them, including his broken relationship with his twin brother, Tommy. And Tommy's depression has hit a new low, so he's not up for fixing anything. In the wake of a devastating storm, Tommy goes out for a swim that...

While armies of the Shadowrealms gather and Machiavelli goes to Alcatraz to kill Perenelle Flamel, fifteen-year-old twins Sophie and Josh Newman accompany the Alchemist to England to seek Gilgamesh.

"Rumors of a coming global apocalypse are building as Skye Rogers gets let in to the most exclusive group in upper class New York"--