The first book ever written about FBI Director J. Edgar Hoover by a member of his personal staff—his former assistant, Paul Letersky—offers unprecedented, “clear-eyed and compelling” (Mark Olshaker, coauthor of Mindhunter) insight into an American legend. The 1960s and 1970s were arguably among America’s most turbulent post-Civil War decades. While the Vietnam War continued seemingly without end, protests and riots ravaged most cities, the Kennedys and MLK were assassinated, and corruption found its way to the highest levels of politics, culminating in Watergate. In 1965, at the...