Peter Van Houten is the author of An imperial Affliction. He does not exist outside of the book The Fault in Our Stars. He is referred to by Hazel as her "third Best friend who does not know she exists." Hazel thinks he is an amazing author, but when Augustus takes her to see him in Amsterdam, he was drunk, and fairly offensive towards her cancer. He was stated to have ugly feet and his alcohol to be mixed with "only the idea of water." He appears at Augustus's funeral in a white suit and tells Hazel that they must fake pray. He was still an alcoholic and offers Hazel a drink of alcohol, which she takes an then throws him out of the car, leaving him on the curb with his drink.

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