Stephen Chbosky wrote the book 'The Perks of Being A Wallflower'.

The statement is true because Stephen Chbosky is indeed the author of the book "The Perks of Being a Wallflower." Published in 1999, the novel gained significant popularity and critical acclaim for its portrayal of the struggles and experiences of a socially awkward teenager named Charlie. Chbosky's writing delves into themes such as adolescence, mental health, and the complexities of high school life, making the book resonate with many readers. Therefore, it can be concluded that Stephen Chbosky did write "The Perks of Being a Wallflower."