The 2016 Presidential Hopefuls Literary Guide

Nearly all of the presumed presidential candidates have released political memoirs.

A copy of U.S. Sen. Marco Rubio's (R-FL) new book 'American Dreams: Restoring Economic Opportunity for Everyone' is seen on a bookshelf at Politics and Prose bookstore January 14, 2015 in Washington, DC.

Photo by Alex Wong/Getty Images)

Judging from the plethora of  titles now crowding bookstore shelves, it would appear that publishing a memoir has become something of a requirement for politicians hoping to become president. 

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