There are already many reviews that do a good job of describing most of the main problems with the book. However, some points need clarifying. First of all, the ending would be OK (the writer gets to end the book however they want), except for the fact that it doesn't make sense according to all of the rules of time-travel that the characters have discovered during the previous 2 books. Secondly, the ending of Mordred would have been much more clever and ironic if he had simply died of food-poisoning. The reviews are pretty on-the-mark with the other villian's deaths, though: they are just not very believable. And again, the characters' sudden obsession with slang speech is pretty annoying. Even more annoying is when reviewers use it. While better than Wolves of the Calla or Song of Susannah, this book is still does not nearly meet the promise of the first 4 books of this series.