A story of the power of curiosity in the hands of a child on a mission to use science to understand her world

A #1 New York Times Bestseller
A Wall Street Journal Bestseller
A USA Today Bestseller

Inspired by real-life makers Ada Lovelace and Marie Curie, this beloved #1 bestseller champions STEM, girl power and women scientists in a rollicking celebration of curiosity, the power perseverance, and the importance of asking “Why?”

Don't miss Ada’s further adventures—with her friends Iggy Peck and Rosie Revere—in the instant New York Times bestseller Rosie Revere and the Raucous Riveters, the first all-new chapter book starring The Questioneers!

Ada Twist’s head is full of questions. Like her classmates Iggy and Rosie—stars of their own New York Times bestselling picture books Iggy Peck, Architect and Rosie Revere, Engineer—Ada has always been endlessly curious. Even when her fact-finding missions and elaborate scientific experiments don’t go as planned, Ada learns the value of thinking her way through problems and continuing to stay curious.