John J. Nance (1946) is an aviation specialist and author. He has written several bestselling books, including Skyhook, Turbulence and Orbit. Two of his novels, Medusa's Child and Pandora's Clock were adapted into successful television mini-series. He is also a lieutenant colonel in the U.S. Airforce Reserve. Nance has also appeared on over 1,300 radio and television shows, including The MacNeil—Lehrer Report, Oprah, and Larry King Live.