THE LOST JEWELS OF ROOM 713

When their aunt is accused of stealing a priceless diamond, cousins staying in a fancy hotel get on the case.

Tween cousins Bea and Céline Bellerose, who had Parisian adventures in The House of Found Objects (2025), are reunited in New York City, where their Aunt Juliette, a journalist, is interviewing French actor Eva Rousseau about her first Broadway role. But when the Tiffany Yellow Diamond necklace Eva is borrowing goes missing, Aunt Juliette is arrested, and the girls investigate, hoping to catch the real thief and prove her innocence. Someone is leaving the girls clues—but are they bringing them closer to the truth, or are they meant to distract? Bea and Céline get help from Zane, the hotel owner’s son (on whom Céline has a crush), as they rush around Manhattan, following clues to landmarks like Grand Central’s Whispering Gallery and the Empire State Building. Technology plays a crucial role, from trackers in suitcases to using a phone for research to surveillance footage. The girls have a lot of independence, though Bea’s parents, who live in New Jersey, check up on them occasionally. Red herrings and Agatha Christie references abound in this zippy, fast-paced mystery. The clashing personality differences between the cousins in the first book have eased; they’re kind and supportive to each other, so the story’s tension comes from the developing mystery and high stakes as Aunt Juliette’s court date approaches. Main characters are cued white.

Read this in a New York minute.