what is the writing style of the original book?
Chbosky found "the most intimate way" to talk directly to the reader.
The Perks of Being a Wallflower
Chbosky found "the most intimate way" to talk directly to the reader. 
what kind of book is the perks of being a wallflower A young adult coming-of-age epistolary novel who is the author? Stephen Chbosky when was it published? February 1, 1999 by whom? Pocket Books what are the names of other books they have published? UNANSWERABLE where are their offices located? UNANSWERABLE who is the owner? Leon Shimkin, James M. Jacobson has the original author written anything else? "Jericho", "Wonder"
wiki:20950242
The Perks of Being a Wallflower [SEP] Style and themes
The idea of anonymous letters came from a real experience; during his senior year in high school, Chbosky wrote an anonymous letter to Stewart Stern about how "Rebel Without a Cause" had influenced him. A year and a half later, Stern found Chbosky and became his mentor. By using a series of letters from Charlie to an anonymous character, Chbosky found "the most intimate way" to talk directly to the reader. He thought the letters would help him keep the story cohesive, "to convey the highs and lows of being young—one day, you're on top of the world and you've had the greatest of times".