After passing a series of mind-bending tests, four children are selected for a secret mission that requires them to go undercover at the Learning Institute for the Very Enlightened, where the only rule is that there are no rules.

"There was once a time when darkness shrouded the world, and the darkness had a queen. Adelina Amouteru is done suffering. She's turned her back on those who have betrayed her and achieved the ultimate revenge: victory. Her reign as the White Wolf has been a triumphant one, but with each conquest her cruelty only grows. The darkness within her has begun to spiral out of control, threatening to destroy all she's gained. When a new danger appears, Adelina's...

Fourteen-year-old Brystal Evergreen has secured worldwide acceptance for the magical community but new threats arise, including the centuries-old Righteous Brotherhood that intends to exterminate all magical life, beginning with Brystal.

As the plague decimates London in 1665 and an assassin threatens the apothecary's life, apprentice Christopher Rowe and his faithful friend Tom, following a trail of puzzles, riddles, and secrets, risk their lives to untangle the heart of a dark conspiracy.

Steeped in Hispanic folklore since childhood, middle schooler Charlie Hernández learns the stories are true when, shortly after his parents disappearance, he grows horns and feathers and finds himself at the heart of a battle to save the world.

"Twins Ethan and Ella go on an adventure in Greece, where they learn about the mystery-solving Society of Apollo"--

Thirteen-year-old Shinji and his S.E.A. cohorts travel to a forgotten island in Polynesia in search of a lost culture.

Christopher Rowe is shipwrecked in Devonshire, where children are disappearing and a ghost is suspected, but even Tom and Sally's arrival may not cure his amnesia in time to help.

"Heiress to the powerful secret society known as the Circle, Avery West crosses continents following a trail of clues she hopes will lead to Alexander the Great's Tomb--and the earth shattering secret it holds--before it's too late"--

Moira Moriarty calls upon the clever Sherlock Holmes, her brother James's roommate at school, to help solve the mystery of her father's death, leading them to a secret sect, a rare jewel, and a friendship torn asunder.