Avery Grambs has a plan for a better future: Survive high school, win a scholarship, and get out. But her fortunes change in an instant when billionaire Tobias Hawthorne dies and leaves Avery virtually his entire fortune. The catch? Avery has no idea why - or even who Tobias Hawthorne is. To receive her inheritance, Avery must move into sprawling, secret passage-filled Hawthorne House, where every room bears the old man's touch - and his love of puzzles, riddles, and codes.

Seventeen-year-old Cassie is a natural at reading people. Piecing together the tiniest details, she can tell you who you are and what you want. But, it's not a skill that she's ever taken seriously. That is, until the FBI come knocking: they've begun a classified program that uses exceptional teenagers to crack infamous cold cases, and they need Cassie. What Cassie doesn't realize is that there's more at risk than a few unsolved homicides—especially when she's sent to live with a group of teens whose gifts are as unusual as her own

Nicole Cassidy is a witch descended from the Greek gods...but she doesn't know it until she moves to a new town and discovers a dangerous world of magic and monsters that she never knew existed. When the Olympian Comet shoots through the sky for the first time in 3,000 years, Nicole and four others - including mysterious bad-boy Blake - are gifted with elemental powers. But the comet has another effect - it opens the portal to another dimension that has imprisoned the Titans for centuries.

As one of the few witches in Britain, Mika Moon knows she has to hide her magic, keep her head down, and stay away from other witches so their powers don’t mingle and draw attention. And as an orphan who lost her parents at a young age and was raised by strangers, she’s used to being alone and she follows the rules...with one exception: an online account, where she posts videos "pretending" to be a witch. She thinks no one will take it seriously.

Ellingham Academy is a famous private school in Vermont for the brightest thinkers, inventors, and artists. It was founded by Albert Ellingham, an early 20th century tycoon, who wanted to make a wonderful place full of riddles, twisting pathways, and gardens. "A place", he said, "where learning is a game." Shortly after the school opened, his wife and daughter were kidnapped. The only real clue was a mocking riddle listing methods of murder, signed with the frightening pseudonym "Truly, Devious".