How many Ada Twist, Scientist books are there?

There are 2 books in the Ada Twist, Scientist series by Gabrielle Meyer, for ages 4-9.

Ada Twist, Scientist Books in Order

2 books · Ages 4–9 · Chapter Books

Ada Twist, Scientist is a 2-book series for ages 4–9 by Gabrielle Meyer. Each book stands alone — start anywhere.

Start anywhere — each book stands alone.

That said, Show Me the Bunny and Ghost Busted are great first picks.

No particular order needed — browse and pick what catches your eye.