Camelot has been founded on Christianity, and magic has been outlawed. This is not to say that magic has disappeared- rather, magical creatures have been banished and those humans practicing magic killed or exiled. Guinevere has been sent with a mission to marry Arthur in order to stay close and protect him against an unknown magical force. Merlin was sent away as a magical creature, but he still knows something is coming for Camelot, and so, he sent Guinevere to help.
There are many twists and turns in the plot that kept me completely hooked all the way through. I also have to give huge props for all the characters who are so well-built and completely unique. For instance, Mordred, Brangien (her lady's maid), and Lancelot were all so three-dimensional that I was as wrapped up in them as Guinevere. Arthur is also not a simple character, and I am still not sure if I really liked him, but I am curious to see how he will evolve in future books. I actually really enjoyed that he was complex enough not to just simply love, and it is easy to understand how Guinevere felt.
This book. I feel a little lost in describing it, because it was completely engrossing and completely delicious and now I have a massive book hangover. If you enjoy fantasy, retellings, and/or complex characters, pick up this book- it does not disappoint. I will definitely be on the lookout for the next book in the trilogy.