Book arc

I am excited to write NanoWrimo this month because 1, Its the book arc. 2, I love books. 3, My mum has written a book and I want to write a book too. I want to write a book for my project about Ancient Rome. I really wonder what we will do for the book arc for e.g learning things we didn't know about books and thinking if they might be a new kid in the middle of the arc because it's possible for e.g I came in during the mirrors arc last year. I really hope I can finish my book for NaNoWriMo or even write more than 15,000 words.