A Court of Wings and Ruin is the third installment in the A Court of Thorns and Roses series by Sarah J. Maas. It is preceded by A Court of Mist and Fury and followed by A Court of Frost and Starlight.
The book was released on May 2nd, 2017, alongside the A Court of Thorns and Roses Coloring Book. This book is the final book in Feyre's narration. Sarah J. Maas has planned more books for the series, however, these books will not feature Feyre as the main protagonist. There will also be two novellas coming in the ACOTAR world along with the full novels.
Feyre has returned to the Spring Court, determined to gather information on Tamlin's maneuverings and the invading king threatening to bring Prythian to its knees. But to do so she must play a deadly game of deceit – and one slip may spell doom not only for Feyre, but for her world as well.
As war bears down upon them all, Feyre must decide who to trust amongst the dazzling and lethal High Lords-and hunt for allies in unexpected places.
Main plot points
A more detailed plot will be written at a later stage.
Feyre succeeds in destroying Tamlin's court from within, causing mass chaos as she creates a rift between the High Lord and the people.
Lucien leaves the Spring Court along with Feyre once he realizes how terrible Tamlin is and wants to find Elain. In addition, it is discovered that Lucien's real father is Helion, High Lord of the Day Court, due to an affair the High Lord had with the Lady of the Autumn Court. This explains why Lucien's father seems to hate him so much; it could be possible that he suspected the affair resulted in Lucien.
Once Feyre returns to the Night Court, she and Rhysand seek to have a meeting between all of the High Lords of Prythian so that they can unite and fight Hybern as one. Feyre must also help her sisters come to terms with being High Fae. Nesta is bitter and angry, while Elain appears to be depressed and empty, and in a state even worse than Feyre's at the beginning of ACOMAF.
Luckily, Cassian and Azriel are fine, and despite the low percentage of it happening, Cassian's wings heal completely. Feyre and the inner circle have a meeting about Hybern deciding they should get Feyre’s sisters to help them and try to fix the holes in the wall, while stopping Hybern from getting allies. Nesta comes to a meeting and agrees to help fix the wall and visit the Court of Nightmares to practice her powers, while the others ask for aid.
Feyre trains with Cassian, and Azriel begins to teach her to fly. Rhys and Feyre visit the library to find information about the wall and decide to recruit the Bone Carver. Feyre and Cassian speak to the Bone Carver and he agrees that if they bring him the Ouroboros Mirror then he will fight with them.
Keir meets with the Night Court inner circle and is reluctant to offer assistance, Rhysand knew this and invites Eris, heir to the Autumn Court to the meeting. Keir says he will help if he can have access to Velaris and Eris will urge his father to attend their High Lords meeting if they support his claim to the throne. Mor is furious that Rhysand made a deal with Eris and Amren explains how the Bone Carver will need to be bound to a body, like she was, to be set free. Lucien sits with Elain, trying to heal her mind with their mating bond. Azriel trains Feyre to use her wings, telling her the story of how Nephelle saved Miryam even though her wings were small and deformed.
Nesta and Feyre are ambushed by Hybern Ravens in the library, they retreat to the pit where something evil lives. Feyre makes a bargain with the monster to bring it company if it kills the Hybern Ravens, it agrees.
Feyre realises that Elain has been made a seer after she tells everyone that there is another mortal queen. The queen was sold to an evil lord and is cursed to turn into a fire bird every night, Lucien offers to go and find her.
Rhys hears word that the Summer Court is under attack, when they arrive no other aid has come and the court is being slaughtered. Mor and Feyre fight their way through the palace, killing any Hybern soldiers they find. Meanwhile Rhys tracked down the King of Hybern but when he goes to strike, the king is nothing but an illusion.
Feyre meets with Tarquin who is still furious with her for stealing the Book and rejects her offer of further help. The Inner Circle arrive at the Dawn Court for the meeting with the High Lords. All the High Lords arrive, with Beron and Tamlin both making an entrance. Tamlin insists that he has come to help but throws insults at Feyre. The High Lords agree they must take a faebane antidote to protect their powers and evacuate the Spring Court immediately.
Feyre finds out that Helion had an affair with Lucien’s mother, making him Lucien’s father. Nesta warns Feyre that they must return home immediately because she senses danger. A huge wave of power ripples over the lands, Nesta becoming sick as it happens and Rhys informs everyone that the Cauldron has brought the Wall down.
Amren and Feyre meet with Bryaxis in the library, offering him a second bargain in return for his help fighting against Hybern. Feyre and the others winnow to Graysen manor to ask Elain’s fiance to shelter humans. Jurian arrives at the meeting, saying he is not the enemy and that he has been fighting Hybern from the inside. Jurian informs them that the Hybern will launch their attack tomorrow from the Summer Court. Graysen is disgusted by Elain now that she is fae and says he no longer wants to marry her.
Mor and Feyre watch the battle rage from atop a hill, until Cassian returns needing to be healed. Feyre and Rhys put a glamour over the war camp so that they can ambush Hybern without their knowledge. Once they discover more of Hybern’s forces Feyre realizes that it isn’t the true army and she goes to ask the Suriel for answers. Feyre asks Elain to use her powers to find the Suriel and meets it in the Middle. The Suriel says that she must use Nesta to find and nullify the Cauldron but before the Suriel can say more Ianthe and two Hybern soldiers shoot it.
Feyre escapes into the Weaver’s cottage and traps Ianthe and the guards inside. Feyre sits with the Suriel as it dies, it tells her that she was kind when no one else was. Nesta uses her abilities to find the location of the Cauldron and opens a link between it and the others who were made, enabling Hybern to take Elain.
Feyre uses Ianthe’s appearance to sneak into Hybern’s camp to rescue Elain. Feyre rescues Elain and Azriel comes to assist them, meanwhile Jurian has left an injured human who Feyre wanted to free. Feyre orders Azriel to leave with the girls, leaving her defenseless but she is saved by Tamlin who intercepts Hybern’s hounds.
Mor tells Feyre that she prefers females and doesn’t love Azriel. Hybern’s final attack is coming and Rhys orders everyone to winnow as many humans as they can out of harms way before the fighting starts.
Feyre goes to the Court of Nightmares to retrieve the Mirror to give to the Bone Carver. He tells her he never wanted the mirror and only wanted to see if Feyre was worthy of helping. As everyone prepares for battle, Feyre reveals that the Bone Carver, Bryaxis and the Weaver will be joining them.
Rhys doubts if they will win the battle just as Tamlin, Beron and Graysen come to their aid. Nesta screams as the Cauldron unleashes its power, killing Illyrian soldiers, she manages to warn Cassian before he is killed. Feyre’s father and Drakon bring their ships and armies to fight against Hybern.
Amren and Feyre run for the Cauldron but when Feyre touches it Amren betrays her. The Cauldron drags Feyre to Nesta, who is facing the King of Hybern who has their father captive. Cassian tries to save Nesta but is badly injured and the King kills their father. Elain thrusts her dagger into the king’s throat killing him. Amren says that she betrayed them so that she could free herself but when she does she will kill everything in her path and not remember her previous life. Feyre realizes that the Cauldron gives everything life and must be restored, Rhys offers himself to be used as a conduit but the effort it takes ends up killing him.
The High Lords resurrect Rhysand and he manages to drag Amren back from dying. Lucien returns from finding Vassa and Feyre meets with Miryam and Drakon and asks them to hide the Cauldron on their island. Feyre calls a meeting to discuss a new treaty with the human and fae lands before they return back to Velaris.
- The Target special edition will contain a letter from Sarah J. Maas and her signature printed on the case cover. 
- Certain editions from Indigo in Canada and Books-A-Million in the US will contain fan art on the end papers. This edition will also be available in Australia. 
- As of 2017, this book is the longest book that Sarah J. Maas has published. It is 699 pages in the hardcover edition.
- The book cover was unveiled on the 25th of January 2017. Before the date of release, Bloomsbury released two teaser images of the cover on their snapchat. The final cover was designed by Adrian Dadich. While, the dress pictured on the cover was originally designed by Charlie Bowater, and later adapted by Adrian Dadich for the final cover. 
- Due to the book's high page count, the pages of A Court of Wings and Ruin are thinner. This was also the case with her other book, Empire of Storms.
- The book is dedicated to her husband, Josh Maas and their dog, Annie.
|Feyre's narration||Other books|
|A Court of Thorns and Roses||Book 4 (Untitled)|
|A Court of Mist and Fury||Book 5 (Untitled)|
|A Court of Wings and Ruin||Book 6 (Untitled)|
|A Court of Frost and Starlight||Wings and Embers|
|Novella 2 (Untitled)|
|A Court of Thorns and Roses Coloring Book||A Court of Thorns and Roses|