The Hidden Room #2

<b>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.</b><br><br>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?