[1] In One Person is narrated by central character Billy, a bisexual novelist.

[3] Irving has stated that while it had taken him seven to eight years to conceptualize the book, he felt that the novel's actual writing process was relatively fast and that due to his experiences in New York, did not have to do as much research.

[5] Other elements mentioned in the book concern transsexuality and the idea of sexual awakening.

[7] Prevalent criticisms of the book centered on the usage of the character of Billy as a way of discussing various themes and issues, with The Telegraph saying that "Bill Abbott ultimately proves better at discussing Irving’s themes than at embodying them.

Club criticized that women in the novel were predominantly portrayed as "hateful, bigoted shrews," but praised In One Person as having several strengths such as the novel's conclusion.