This book has to be the best one so far and I sat and read it in 2 hours flat.
Aislinn and Keenan although Summer King and Summer Queen, have still not consummated their relationship because of Aislinns love for Seth her mortal lover. This in turn has caused Donia, the Winter Queen, suffering because although she knows that Keenan loves her, he will never come to whilst there is a chance that Aislinn will falter and give in to him.
Meanwhile, in Faerie, the true heart of all the Courts, whether the Seelie or the Unseelie Courts, Sorcha the true Queen is visited by her sister Bananach who is the embodiment of cruelty and war and constantly machinates on how to bring about destruction and devastation to both the Sidhe and mortals alike. Sidhe if you didn't know is the correct term for Faery. It is an old Celtic word pronounced as 'Shee'. Sorcha is her polar opposite and likes nothing more than for order to reign within her Court and also outside of it.
Seth is becoming more and more dissatisfied with the way that Keenan is toying with Aislinn and decides maybe rashly to do something about it. He approaches Niall, the now King of the Dark Court and asks him to 'curse' him but Niall refuses. Bananach being also of Niall's court hears of this and thinking that it will cause chaos and then outright war, takes things into her own hands and leads Seth to Faerie and to Sorcha. He disappears for nearly 6 months (only a month in Faerie) having been 'cursed' by Sorcha. I don't want to put a spoiler in here but this curse is not the kind of curse you may think it would be not to Seth anyway.
He eventually returns to the Summer Court where Aislinn is alternately deliriously happy to see him but furious that he went away without saying anything. She is even more cross when she discovers what he has done and that Keenan, Donia and Niall all knew but didn't tell her. This of course is Bananachs doing as she would have all out war between all of the courts.
The ending of the book is truly brilliant and Seth has changed in more ways than one!
Very cleverly written with superbly rounded characters and also the way that the author has woven this story is in essence, part Sidhe itself. I can't wait for the next book.