For anyone who read The Cruel Prince and was left with a distaste for Jude's twin sister Taryn, this will give insight into why she made the choices she did while not absolving her of anything. While it's not required to continue the series, I'd recommend listening to this before The Wicked King or The Queen of Nothing in order to have a complete picture of what exactly happened behind the scenes that led the Duarte twins on their differing paths.