Grade 7 Up?Adair deftly portrays Edison's life and creative genius in this thorough, well-balanced biography. The book offers more information and insights than most biographies of the man for this audience, and includes the rarely reported fact that cats, dogs, and farm animals were electrocuted in Edison's laboratory. Lengthy sidebars provide descriptions of inventions but, unfortunately, interrupt the flow of the text. Black-and-white photographs of the Edison family and drawings of various inventions appear throughout. Useful features include a list of museums and historic sites and a substantial index.