21 books • 4 series
They Changed the World: Crick & Watson - The Discovery of DNA (Campfire Graphic Novels) (Campfire Graphic Novels)
World War Two: Under the Shadow of the Swastika (Campfire Graphic Novels) (Campfire Graphic Novels)
They Changed the World: Bell, Edison and Tesla (Campfire Graphic Novels) (Campfire Graphic Novels)
Conquering Everest: The Lives of Edmund Hillary and Tenzing Norgay (Campfire Graphic Novels)