From Edgar Award Winner Dori Hillestad Butler comes The Treasure Troop, a chapter book mystery series! Join Marly, Sai, and Isla, three code-cracking kids on the hunt for an old neighbor's hidden treasure.
In the fourth and final book of this code-busting series, Marly, Sai, and Isla are back on the hunt. After their shocking discoveries on Summer Island, the Treasure Troop has one final set of clues to follow before reaching the end of their search. And now our trio must solve the toughest mystery of all: what really happened to Mr. Summerling?
Series Overview: The fourth in a chapter book mystery series featuring Marly, Sai, and Isla as they go on code-cracking adventures searching for an old neighbor's hidden treasure. Books 1 and 2 publishing simultaneously in Spring 21, with Book 3 publishing in Summer 21, and Book 4 publishing in Fall 21.

Dori Hillestad Butler; Illustrated by Tim Budgen