Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases. John Hudson Tiner has been a science teacher, mathematician, and a cartographer (map maker). He is the author of more than 30 books. "I especially like to write biographies of famous people of the past," he says. "After I finish the research, a magic moment occurs when the story takes over. The characters come alive. No longer am I a writer. I become a time traveler who stands unseen in the shadows and reports the events as they take place." Mr. Tiner is well known for his popular books about science and religion. Other Sower Series books by Mr. Tiner include biographies of Isaac Newton, Johannes Kepler, Samuel F. B. Morse, and Robert Boyle. He is also the author of several science textboooks. John Tiner and his wife, Jeanene, live in High Ridge, Missouri. The have two children, John Watson and Lambda, and two grandchildren, Adam and Sydney.