I did not want this series to end. I really hope that this author comes out with more books. I would love to see his take on other mythical characters. The ending surprised me a little because I expected the setting to be the opposite of what it was (there are 2 main settings I am referring to. Artie's world or Arthur's world). However I can understand why the author chose the ending he did. This book really brought the legend of Arthur into today's world. The Holy Grail, Avalon, and of course Morgaine were all in this final installment. I liked the music key versus a door key "clue". This is definitely a book that I will be reading with my nieces and nephew! I am giving this book a 5/5. I was given a copy to review, however all opinions are my own. ( )