Queen of Air and Darkness is the third and final book in the Shadowhunter Chronicles series by Cassandra Clare. It follows the story of the Shadowhunters and their allies as they attempt to save the world from a demonic force known as the Black volume.
The book begins with Emma Carstairs, Julian Blackthorn, and their parabatai, Mark and Cristina, venturing back to the Shadow World in search of answers to a magical curse that has been afflicting them. While there, they receive help from a powerful warlock and decide to delve deeper into their mission, uncovering an ancient evil—the Queen of Air and Darkness—that has returned to the Shadow World.
The group soon realizes that the Queen's return signals an even greater threat. To prevent her from destroying the world, they must fight to the death and make a pact with the Faeries, who appear to be her only allies.
Throughout their fight, the Shadowhunters come up against powerful enemies and allies alike, uncovering secrets about their world that had been previously unknown. Most importantly, the Shadowhunters must embrace their own power and learn to fight together if they are to stand a chance against the Queen.
In the end, the Shadowhunters come together to successfully thwart the Queen's plans. In the end, they learn the truth about their world, including the secret of the genetically engineered angels, and their place in the universe.
Queen of Air and Darkness is an exciting, action-packed story that will keep you on the edge of your seat. Explanations of the Shadowhunter world, its creatures and its rules are carefully woven throughout this conclusion to an unforgettable series.