The Questioneers

Aaron Slater, Illustrator

Ada Twist, Scientist

Sofia Valdez and the Vanishing Vote

Iggy Peck and the Mysterious Mansion

Ada Twist and the Perilous Pants: The Questioneers Book #2

Ada Twist, Scientist: The Why Files #2: All About Plants!

The Science of Baking (Ada Twist, Scientist: The Why Files #3)

Ada Twist, Scientist: Why Files #1: Exploring Flight!

Team Green! (Ada Twist, Scientist: The Why Files #6)

Bug Bonanza! (Ada Twist, Scientist: Why Files #4)

Rockin' Robots! (Ada Twist, Scientist: The Why Files #5)

5-Minute Ada Twist, Scientist Stories

Ada Twist and the Disappearing Dogs: (The Questioneers Book #5)