Thirteen-year-old sleuth Skylar Robbins plans to become a private detective like her grandfather. Stuck at her bullying cousin Gwendolyn's Malibu estate for the summer, Skylar brings her fingerprinting kit, portable spy tools, and her journal for taking notes in secret code. She had no idea how dangerous the next eight weeks would prove to be.

As soon as Skylar gets to Malibu, mysterious things begin to happen. She discovers a hidden garden behind a rusted gate in Gwendolyn's huge back yard. Her new friend Kat, who claims to be a witch, recognizes magical elements throughout the garden...

A deserted mansion perches on a steep hillside, overlooking a rocky canyon. Tattered curtains hang behind broken windows, and a turret stretches toward the sky. Three years ago the wealthy owner disappeared suddenly, leaving behind a house full of secrets: A mysterious note, tantalizing clues, a hidden floor, one piece of a treasure map, and a missing fortune in diamonds.

Thirteen-year-old sleuth Skylar Robbins moves into the mansion with her parents and embarks on a new and dangerous mission. Armed with her detective kit, and with the support of her BFF Alexa and a team of secret...