Teen Review: Sarah J. Maas has definitely DONE IT AGAIN! I'm a big fan of Throne of Glass series and I'm a fan of this, now, too. ACoRaT is pushing the border into new adult, but is still considered young adult. Sarah J. Maas's new book is still set in a magical, high fantasy world where anything can happen. The plot was excellent. The plot twists went undetected by me until they happened. The book tells a story about Feyre, a nineteen year-old huntress.