Since I don't know the details of the 'Atticus Fawn' novel, it's difficult to say what makes it special. But perhaps its unique combination of characters, like the eponymous Atticus and the fawn, could be a factor.
The 'Atticus Fawn' novel is not a widely known one to me. However, if it's a fictional novel, it might revolve around a character named Atticus and perhaps a fawn could be a central element in the story, like it could be a symbol of innocence or part of a journey that Atticus undertakes. Without reading it, it's hard to say for sure.
There could also be a plotline where Bella tries to understand why she was made the unwanted bride in the first place. She delves into the history and politics of the vampire or werewolf world (depending on the context of the fanfiction) and uncovers secrets that not only help her deal with her current situation but also change the entire power dynamic in that world.
I'm not sure specifically as there could be many different interpretations of a 'before the fawn fanfic'. It could be about events that happen prior to the appearance of a fawn in a particular fictional world. Maybe it details the backstory of a character who later encounters a fawn, or it could be about the setting and circumstances that lead up to a fawn - related event in the story.
I'm not sure if it's popular. There are so many fanfics out there, and without more information or a broader fan community's input, it's hard to determine its popularity.
Atticus and Zane are likely characters created within the fanfiction world. They could be friends, colleagues, or even rivals. Without more context from the actual fanfiction, it's hard to say exactly who they are. But they are the main characters involved in this shaving - related situation.
They are likely characters within the context of the fanfiction. Without reading it, it's hard to say exactly who they are. They could be original characters created for this fanfiction, or they could be characters based on an existing fandom, like a book, movie, or TV show.
No one really knows for sure what exactly happened at the so - called Atticus Institute in real life. The movie or story just gives a fictionalized account.