SOLVED. YA Book opening scene is of a old and dying queen switching bodies with a young girl [s]

[Bailey]

What I remember of this book:The opening scene is of a old and dying queen switching bodies with a young girl. The book continues into the first chapter. It's about a girl (can't remember her name) living in a future where there is a class system. She is a merchant class; her family owns a rest restaurant. Her best friend's name is Brooklyn. Her sister doesn't talk. She goes to a school for the lower classes and pumps into a boy from a higher class. And the last thing I remember is that pretty early in the book, the father kills someone who was threatening to expose the family as traitors of the royal government (I think it's in a flashback.)
This book is Young Adult so I found it in my school's library a few years ago.

[Lisa]

The Pledge

[Bailey]

Thank you so much!

[Lisa]

You're welcome.