Helaine Becker, author of Counting on Katherine: How Katherine Johnson Saved Apollo 13, will be signing in the Raincoast Books booth #417/419 on Friday at 10:00 AM.
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? Counting on Katherine is the story of a groundbreaking mathematician who saved lives and made an enormous contribution to history.
