New York Times bestseller! Now starring in the Emmy Award–winning Netflix series!

From the #1 New York Times bestselling team behind Ada Twist, Scientist and Iggy Peck, Architect comes a lively chapter-book adventure packed with science, friendship, and curiosity.

Ada Twist is the Queen of Questions. Why does hot coffee smell stronger than cold? What kinds of birds live in her backyard? And why does her brother Arthur get so cranky when she borrows his things for experiments? For Ada, every question leads to another exciting discovery.

When Rosie Revere's Uncle Ned gets carried away in his famous helium pants, Ada's curiosity is suddenly put to the test. How high can a person float? Could Uncle Ned drift all the way into outer space? And most importantly, how can Ada and her friends bring him safely back down?

With help from fellow Questioneers Rosie Revere and Iggy Peck, along with Arthur and some new friends, Ada must use science, teamwork, and quick thinking to solve a high-flying problem before it's too late.

Perfect for independent readers, Ada Twist and the Perilous Pants is the second book in the bestselling Questioneers chapter book series, combining adventure, humor, and STEM learning in a story that inspires kids to ask questions, explore new ideas, and never stop wondering.

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