Great Scientists: Katherine JohnsonKatherine Johnson tells the story of this famous figure, whose work as a mathematician for NASA helped the US land astronauts on the moon during the space race. Great Scientists are first biographies introducing some of the world's great scientists, simply retelling their lives and explaining why their work was important. Perfect for children aged 7 plus. Each book has been book banded and includes a quiz at the end to test what has been learned.