Lila Greer has always loved mysteries, even when they scare her. When a spooky storm blows into Blue River Creek and Lila is startled awake by a strange shrieking shadow, she knows something is afoot.

Stranger still, Lila and the Questioneers discover that on the night of the storm, someone broke into Iggy's parents' art gallery and stole all the paintings for the new exhibit. Could the mysterious shrieking shadow have something to do with the missing artwork?

Ms. Greer and her Questioneers will have to use their detective skills to solve the mystery of the missing paintings before the exhibit's grand opening, or the gallery might have to close forever!

Watch the Questioneers in the Netflix television series Ada Twist, Scientist!

Check out all the books in the Questioneers Series:

• The Questioneers Picture Book Series: Iggy Peck, Architect Rosie Revere, Engineer Ada Twist, Scientist Sofia Valdez, Future Prez Aaron Slater, Illustrator Lila Greer, Teacher of the Year Billie Jean Peet, Athlete
• The Questioneers Chapter Book Series: Rosie Revere and the Raucous Riveters Ada Twist and the Perilous Pants Iggy Peck and the Mysterious Mansion Sofia Valdez and the Vanishing Vote Ada Twist and the Disappearing Dogs Aaron Slater and the Sneaky Snake Lila Greer and the Shrieking Shadow
• Questioneers: The Why Files Series: Exploring Flight! All About Plants! The Science of Baking Bug Bonanza! Rockin' Robots! Team Green!
• Questioneers: Ada Twist, Scientist Series: Ghost Busted Show Me the Bunny Ada Twist, Scientist: Brainstorm Book 5-Minute Ada Twist, Scientist Stories
• The Questioneers Big Project Book Series: Iggy Peck's Big Project Book for Amazing Architects Rosie Revere's Big Project Book for Bold Engineers Ada Twist's Big Project Book for Stellar Scientists Sofia Valdez's Big Project Book for Awesome Activists Aaron Slater's Big Project Book for Astonishing Artists