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

From the #1 New York Times bestselling team Andrea Beaty and David Roberts who created Ada Twist, Scientist and Iggy Peck, Architect comes a spirited story full of adventure, friendship, and science!

Ada Twist is the Queen of Questions. Like, why does hot coffee smell stronger than cold? What kind of birds live in her backyard? And, especially, why does her brother Arthur get so cranky when she borrows his stuff for experiments? But Ada's questions really come in handy when her friend Rosie Revere needs help. Rosie's Uncle Ned has gotten carried away in his famous helium pants, and Ada needs some answers--fast! How high can Uncle Ned float? Will he fly off into outer space? And, most important, how can they get him down? With the help of her fellow Questioneers Iggy Peck and Rosie Revere, her brother Arthur, and some new friends, Ada Twist is ready to save the day!

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.

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

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

Ada Twist, Scientist: The Why Files Series: Exploring Flight! All About Plants! The Science of Baking Bug Bonanza! Rockin' Robots! Going Green!

Questioneers: Ada Twist, Scientist Series: Ghost Busted Show Me the Bunny 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