[The Ones In Those Who Do Not Exist] Fourth Wing

What would you do if you got reincarnated in a world that only exist in books? Augustina and her friends woke up in a strange world. After discovering they were children of the villains of the book. The only odd thing was that the people they reincarnated as were never mentioned in the book before. After getting answers from the Moon Goddess they distinctly learn that they should be able to complete the storyline in order to go back home. Somi and Taehyung have graduated in Basgiath, but what about Tina, Yunjin, Jake and Mingyu?
After training for 10 years, crossing the parapet would be easy but they will be in the scene of when Violet and Xaden meet in the college for the very first time. Will they survive being in Basgiath after knowing what will happen? Will this affect the storyline? Will they be able to go back home knowing that the book is not complete yet? Who sent them? And why?

*Please read Fourth Wing by Rebecca Yarros before reading this. All the characters are rightfully hers*