New York Times bestseller!
Now a Netflix Series!

"Packs plenty of information into a high-flying adventure." --School Library Journal

"Adventure, humor, and smart, likable characters make for a winning chapter book." --Kirkus Reviews

In Ada Twist and the Perilous Pants, Ada must rely on her curious mind, her brave spirit, and her best pals, Rosie Revere and Iggy Peck, to solve a mystery in her own backyard.

Ada Twist is full of questions. A scientist to her very core, Ada asks why again and again. One question always leads to another until she's off on a journey of discovery! When Rosie Revere's Uncle Ned gets carried away wearing his famous helium pants, it's up to Ada and friends to chase him down. As Uncle Ned floats farther and farther away, Ada starts asking lots of questions: How high can a balloon float? Is it possible for Uncle Ned to float into outer space? And what's the best plan for getting him down?

Ada Twist and the Perilous Pants is the second in a unique and exciting series of chapter books for children, parents, and teachers who want to make STEM (science, technology, engineering, and math) fun.

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
• 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
• Questioneers: The Why Files Series: Exploring Flight! All About Plants! The Science of Baking Bug Bonanza! Rockin' Robots!
• 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