"For twin sisters Scarlet and Ivy, boarding school has been a horrid mix of murderous headmasters, painful punishments, and vicious classmates. But it's a new year, and things are looking up. The kindly Mrs. Knight is in charge, their classmates have been civil, and the weather is even brightening up. Unfortunately, when their beloved ballet teacher, Miss Finch, suddenly disappears and strange Madame Zelda takes her place, freakish things start happening....

"At the bidding of their cold-hearted stepmother, twin sisters Scarlet and Ivy are sentenced to board for a year at Rookwood School. The headmaster is cruel, the hallways are drafty, and there seems to be a thief afoot. When the finger of suspicion is pointed at Scarlet, she'll do whatever it takes to clear her name?including some late-night detective work. But in the darkness of Rookwood, mysteries of the past come to light. The walls are talking...

After discovering that a high-speed personal jetpack has been commissioned by an evil enterprise to be a thieving tool, Carmen Sandiego swoops in to retrieve it, in a book that allows readers to make choices that determine the path of the narrative.

"When Scarlet and Ivy return to Rookwood after the holidays, they quickly realise that the school is in danger. The twins will need to confront enemies from their past and present if they are to have any chance of it surviving. Could the last secret at Rookwood be the one that brings it down forever? Or will Scarlet and Ivy be able to untangle the trails of clues and red herrings in time to save the school?"--

"After camping in Rocky Mountain National Park, Jake and his friends travel to the Great Sand Dunes in southern Colorado. Exploring the heart of the dunes, they stumble upon something both unexpected and dangerous. Through more twists and turns, Jake's friendships and integrity are tested by choices that will demand smarts and courage. The mystery unfolds as Jake, Amber, and Wes learn about survival skills, natural history, integrity, character, and...