Descendants(Isle of doom)

I am going to make a hole book series based of descendants and the descendants books and they all have their own special name which is in brackets ( ) so this one takes place on the Isle of the lost before the first move and is based off the first book and I have changed alot like in this book Mal has a twin sister named Malia and I know that Mal's full name is Malevolent but in this book it is Mallory oh and I am not just adding Malia I am also adding Mad Maddie yes Mad Maddie from the second book so now it's not the core 4 it's the core 6 and right now Mal, Malia, Jay, and Mad Maddie are friends but Evie is not one of their friends as a matter of fact Evie was locked in a castle for 10 years and Carlos is just the nerd that is bullied but they all become friends before they go to Auradon you'll see if you read the book also there's a lot of more people than in the movies and I am sorry if it's not a good book it is my first book and I had nobody read the book first and I am slowly updating