"Marly, Sai, and Isla are back on the hunt. After finding Mr. Summerling's hidden treehouse, they've discovered a new set of clues for them to follow, leading them straight to the heart of their mysterious neighbor's life: his house. The same house Marly has been living next to all of these years, which, they discover, is filled with hidden rooms and staircases. With just a few scraps of papers as clues, and Mr. Summerling's angry son on their tails, can the Treasure Troop find the answers they're looking for?"
Butler, Dori Hillestad. Treasure Troop ; 2.
The Treasure troop
The Treasure troop ; 2
Friendship -- Juvenile fiction.
Inheritance and succession -- Juvenile fiction.
School children -- Juvenile fiction.
Schools -- Juvenile fiction.
Treasure hunt (Game) -- Juvenile fiction.
Treasure troves -- Juvenile fiction.
Penguin Workshop (Firm), publisher.