When Henry's magic teacher, The Amazing Arthur, goes missing right before the Greenfield Magic Shop's annual magic show, Henry and his sibilings look into Arthur's disappearance.

"Thirteen-year-old Lily Hartman always dreamed of adventure. A strong-willed girl, Lily felt trapped in a life of Victorian stuffiness at her prim boarding school. But after her father--a famous inventor--disappears on a routine zeppelin flight, Lily's life gets turned upside down. Now cared for by her guardian, the heartless Madame Verdigris, Lily is quite certain that she's being watched. Mysterious, silver-eyed men are lurking in the shadows, just...

In Dorset, England, twelve-year-old Kat Wolfe opens a pet-sitting business, but the owner of her first client goes missing and only her new friend shares Kat's conviction that the parrot's owner is the victim of foul play.

"When Dr. Alistair Fairfleet, the Institute's eccentric chairman, disappears on the first day of Alex and Asha's summer vacation, they receive a letter written by the missing millionaire inviting them to a mystery involving complicated clues and puzzles. It is just the sort of case they've been waiting to tackle. But nothing in the Fairfleet case has a simple solution. As the kids track down clues, they uncover art forgeries, archaeological crimes,...