The Cipher of Gull Rock Light
A Lighthouse Island Mystery

About this book:

Unlock the secrets of Gull Rock Light. Eleven-year-old codebreaker Sophia Sterling believes every pattern can be solved—and the one left by her late grandfather is the most tantalizing of all. A strange brass key, engraved with three mysterious symbols, is her only clue to a wartime mystery hidden on a lonely island off the coast of Maine. When she and her mother arrive at the fog-shrouded lighthouse, they find a keeper’s house full of dusty ledgers, cryptic journals, and the lingering echoes of a man who never told the whole story. But the island has more than just old papers: a pigpen cipher scratched into a desk, a hidden grille in the cellar, and a midnight boat that still haunts the tide pools.

As Sophia deciphers her way through the 1943 ledger and follows a trail from the lantern room to a rumrunner’s map, she discovers that the biggest puzzle isn’t just in the brass key—it’s in the shadows moving on the catwalk. Someone else wants the answers buried on Gull Rock, and they’ll do anything to keep the light from shining on the truth. With the tide rising and a smuggler closing in, Sophia must race to crack the final substitution before she’s trapped in the tower forever. *The Cipher of Gull Rock Light* is a gripping island mystery for anyone who loves codes, coastal secrets, and the thrill of a puzzle that won’t let go.