G. Bruce Boyer isn't a fashion designer, but he might know more about clothes than most do.

Mr. Boyer, 70 years old, has established himself writing about stylish clothes and the men who wear them for more than 35 years. He left a job as a literature professor at DeSales University in 1973 to work for Town & Country magazine and has since written for the likes of the New Yorker, Esquire and Harper's Bazaar. In addition, he delves into the looks and lives of some of fashion's leading men.

His...