Can 12-year-old Thunder and her friends unravel a Revolutionary War-era spy mystery involving a hidden diary and buried treasure before the dangerous Fairmount Prowler does?
A suspenseful middle grade novel about history, found family, girl power, and critical thinking.
Is a hidden diary the key to a mysterious spy ring from the American Revolution?
Twelve-year-old Theodora "Thunder" Underwood hates summer vacation. Her parents go off to remote corners of the world on scientific expeditions and leave her with some relative or other who clearly doesn't want her around. But maybe this year, 1979, will be different…
Thunder is spending her summer at Mount Pleasant, a crumbling old mansion outside Philadelphia once owned by Revolutionary War traitor Benedict Arnold. There, Thunder discovers a mysterious diary, written by Mercy, a girl her age who lived through the American Revolution. She's plunged into a mystery involving a hidden ring, which she and her new friends must solve before the Fairmount Prowler-a notorious local burglar-does.
