Black Mass - Dick Lehr and Gerard O'Neill

Black Mass by Dick Lehr and Gerard O'Neill is an epic story of violence, double-cross, and corruption at the center of which are the black hearts of two old friends whose lives unfolded in the darkness of permanent midnight. James "Whitey" Bulger became one of the most ruthless gangsters in US history, and all because of an unholy deal he made with a childhood friend. John Connolly a rising star in the Boston FBI office, offered Bulger protection in return for helping the Feds eliminate Boston's Italian mafia. But no one offered Boston protection from Whitey Bulger.