Two podcasting sleuths help their neighbor solve a cold case—one that's literally etched into the walls of their Brooklyn apartment building—in this cozy, twisty-turny middle grade whodunnit from the author of The Queen of Ocean Parkway.

Twelve-year-old globetrotter Thea Lim-Lambert is spending a rare summer at home in Brooklyn, when she discovers a secret room in the back of her closet. There, among her grandfather Errol’s old diaries and peculiar carvings, is a clue Errol left to a massive hidden treasure. But to find it, she'll need the help of two experienced sleuths—lucky for her, two of the best live in her building!

Roya and Amin’s mystery podcast has earned them a stellar reputation, but they never could have guessed that their latest case would send them on a wild scavenger hunt in their own building. Clue by clue, they search the building from roof to cellar (thanks to Roya's mom's master key). But just when a solution seems near, they realize an essential piece is missing—locked away where none of them can reach it. And unless Thea finds the courage to stand up to her family the treasure of Ocean Parkway may be lost forever. . .

"Hand to fans of Ellen Raskin or Rebecca Stead. . . the right level of mystery, daring characters who learn to stand up for their friends, and a big-hearted ending that’ll wrap you in a hug."—Booklist