This book is an open door into a fantastical world of upside-down trees, white sandy beaches, and mystical music. The Kingdom of Back follows the sister of Wolfgang Amadeus Mozart, Nannerl, and her struggle to be remembered as a girl in a man’s world. She soon stumbles upon an eerie new world, with a curious prince who offers to make sure she is remembered. The fantasy twist on a historical story makes this read more enticing and addicting. The characters are so well formed and likable that it’s impossible to forget about them. The flowing way the book is formatted makes this an quick read. I highly recommend this book to anyone who loves fantasy. Readers who also enjoy music will also take a liking to this book as well.