Ages 10 & up. Detailed information with photographs and drawings. Daniel Hale Williams, who performed open-heart surgery, Garrett A. Morgan, who invented the gas mask and traffic lights and Lewis H. Latimer, a pioneer in electrical lighting are among the fourteen people profiled in this engaging book. "Though their work may not have gotten the recognition it deserved during their lifetimes, their achievements have saved countless lives, improved jobs all over the world, and altered the course of history. Author - Louis Haber. 262 pages. Ages 10 & up