Where in the World is Benjen Stark?

In the Game of Thrones books, Benjen Stark is a lost ranger of the Night's Watch. He enters the story in book one, as the Lord of Winterfell's younger brother and the mentor to Jon Snow. Then, he disappears from Jon's chapters, as he becomes lost beyond the Wall. Is Benjen Stark dead, or will he reappear in The Winds of Winter or A Dream of Spring? Why did Benjen join the Night's Watch in the first place? And what does he know about Jon Snow? Timestamps: 0:00 - 0:50 Intro 0:50 - 2:34 Before the Ranging 2:34 - 13:20 Tourney of Harrenhal 13:20 - 15:46 Coldhands & Where Benjen Isn't 15:46 - 18:15 Where Benjen Might Be 18:15 - 20:29 Rhyme With The Last Hero 20:29 - 22:15 Chekhov's Gun 22:15 - 24:00 Last Words #asoiaf #gameofthrones