Four: A Divergent Collection is a collection of five short stories from the Divergent trilogy, told from Tobias Eaton's (Four) perspective, and written by Veronica Roth. The first story of the collection, Free Four: Tobias Tells the Divergent Knife-Throwing Scene, was released as an e-book on April 23, 2012. The second story, The Transfer, was released on September 3, 2013. The third story titled The Initiate, the fourth story The Son and the fifth and final story The Traitor were released on July 8, 2014. Simultaneously with the release of last three short stories, a collected edition of the five short stories titled Four: A Divergent Collection was released on July 8, 2014, which also features three exclusive scenes. Source: Wikipedia (en)