P. W. SINGER is an expert on twenty-first-century warfare. His award-winning nonfiction books include "New York Times" bestseller "Wired for War".

William F. Hughes, Ph.D., is professor of mechanical engineering at Carnegie-Mellon University. He was a National Science Foundation postdoctoral fellow at Cambridge University in England and a Fulbright Fellow at the University of Sydney in Australia.

John A. Brighton, Ph.D., is a dean of engineering at Pennsylvania State University and has taught at Purdue, Carnegie-Mellon, Michigan State, and Georgia Tech.

Nicholas Winowich, Ph.D., is an associate professor at the University of Tennesee, Knoxville, and a member of one of the foremost computational fluid dynamics research groups in the country.

Josh Mack (New York, NY) has worked as a painter, a carpenter working and traveling the Northeast out of an old telephone company van that refused to die, an advertising copywriter, and a freelance writer. He is also the author of"Karma 101: What Goes Around Comes Around and What You Can Do about It".