Where did Charles Darwin sail to on the HMS Beagle? Why did Darwin keep his theories secret for years? The 'Leveled Biographies' series offers leveled, high-interest nonfiction in a range of text genres. Each title tells the story of one memorable life, using pictures, maps, sidebars, and engaging text to make each person's story come alive. The 'Charles Darwin' book includes examples of the biography and recount text types.