1990. Dr. Fran Balkwill. This is the true story of the amazing defenders inside your body. A brave band of cells keeps you healthy by constantly battling against all kinds of invading germs. Every minute, every hour, every day of your life, they are fighting . . . cell wars! Cell Wars discusses the defender cells of our immune systems in an interesting, accessible way. 32 pages, soft cover, full-color. Grades 3-6.