Book 1

From Edgar Award Winner Dori Hillestad Butler comes a new chapter book mystery series, The Treasure Troop! Join Marly, Isla, and Sai, three code-cracking kids on the hunt for an old neighbor's hidden treasure.

Marly always knew Mr. Summerling as her friendly neighbor living in the big, old house next-door. Sure, he walked around with a metal detector and talked about being a "treasure hunter," but she didn't think much of it. But when news of Mr. Summerling's death arrives at her doorstep, Marly is brought into a treasure hunt of her own. In Mr. Summerling's will, he's left a treasure for Marly and her two classmates, Isla and Sai. The catch? They have to solve a series of riddles, puzzles, and clues to find its location. And not only that, they have to work together on it -- which Marly is not looking forward to. But with no other choice, she, Isla, and Sai set off on the hunt. Can the three kids come together to crack the code? And even if they do solve the clues... what could Mr. Summerling possibly have left them?

Book 2

The Hidden Room #2

by Dori Hillestad Butler

Published 19 January 2021
From Edgar Award Winner Dori Hillestad Butler comes a new chapter book mystery series, The Treasure Troop! Join Marly, Sai, and Isla, three code-cracking kids on the hunt for an old neighbor's hidden treasure.

In the second book of this code-busting series, 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?

Book 3

Summer Island #3

by Dori Hillestad Butler

Published 13 July 2021
From Edgar Award Winner Dori Hillestad Butler comes a new chapter book mystery series, The Treasure Troop! Join Marly, Sai, and Isla, three code-cracking kids on the hunt for an old neighbor's hidden treasure.

In the third book of this code-busting series, Marly, Sai, and Isla are back on the hunt! Mr. Summerling has left them a brand-new set of clues to follow, including tickets to the mysterious Summer Island. So with tickets in hand, our trio sets off to their late neighbor's island. Can they finally discover what lies at the end of this treasure hunt?

Book 4

The Final Treasure #4

by Dori Hillestad Butler

Published 12 October 2021
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?