Rod Cross is the co-author of The Physics and Technology of Tennis and has written extensively for the United States Racquet Stringers Association's (USRSA) Racquet Sports Industry and Racquet Tech magazines. He is a former associate professor in physics at the University of Sydney-Australia. Crawford Lindsey is the co-author of The Physics and Technology of Tennis and the author of The Book of Squash. He is the editor in chief of Racquet Sports Industry magazine and at Racquet Tech Publishing. He lives in San Diego, California.