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)