Mr. Hastings, an intrepid war zone reporter in Afghanistan and Iraq, won a Polk Award in 2010 for his Rolling Stone magazine cover story, “The Runaway General.”
Mr. Eidus, an advertising executive, began his career as an internationally acclaimed concert violinist who made it to Carnegie Hall as a soloist at age 13.
Mr. Sharpe, whose books included “Porterhouse Blue” and the Henry Wilt series, used crudity and excess in taking on targets like racism, the aristocracy and academia.