The Fifth Assassin is a 2013 novel written by Brad Meltzer that follows the adventures of archivist Beecher White as he discovers a connection linking the four successful presidential assassins with a modern-day killer who is recreating their crimes. It is part two of the three-part book series, The Culper Ring series; that also includes The Inner Circle (book one, published 2011) and The President's Shadow (book 3, published 2015). Source: Wikipedia (en)