Sluby, a former primary US patent examiner, presents a thorough and fascinating history of the contributions of African Americans to the world of invention, and to our present quality of life. Her well-written and engaging portrait of many black inventors and scientists is derived from a comprehensive review of all the patents that have been issued to African Americans from the days of slavery to the present high-tech era….An important addition to the literature on contributions of African Americans to US history. Highly recommended. All levels.