• A young Katherine Johnson sits on a chair in front of a moon image decorated with different mathematical formulas. The paperback book is blue, with yellow text, and is 11.3" x 9.4".

Counting on Katherine: How Katherine Johnson Saved Apollo 13 by Helaine Becker, Illustrated by Dow Phumiruk

$ 18.99

You've likely heard of the historic Apollo 13 moon landing. But do you know about the mathematical genius who made sure that Apollo 13 returned safely home? As a child, Katherine Johnson loved to count. She counted the steps on...

View Full Details