MR. FLAGLER'S ST. AUGUSTINE. By Thomas Graham. Hardcover. 497 Pages. This monumental biography tells the story of how one of the wealthiest men in America spared no expense to turn St. Augustine into a highly desirable vaction destination for the rich. Author Thomas Graham reveals much about the inner life of the former oil magnate and the reasoning that drove him to expand a coastal empire that eventually encompassed Palm Beach, Miami, and Key West.