Publisher's Synopsis
When thirteen-year-old Thom's father goes missing, Thom knows something's up so he breaks into the basement only to find a spy center full of spy equipment.
With the help of his friend, Danny, and Danny's fifteen-year-old sister, Hilly, the three of them set out to discover what happened to Thom's father, but their investigation brings them to the attention of a powerful group of art thieves who would do anything to protect their identities.
