The book is good in terms of the revelations and/or answers about some of the questions that readers might have asked at one point - to say the least - due to incomplete details about certain characters from the previous novels of the series (especially about the the nature of one character/protagonist whose final and continuing image was presented with a not-so-evident clue - if not non-existing - from the previous books). However, I find it disappointing because of one important terminology that has not been clearly established as compared with that of the "The Warlock" where one important term was clearly defined and attributed to its intended character. Nonetheless, I had fun reading it. It's just sad that Michael Scott left no clue if whether or not he'll be making another novel that may somehow continue this epic series - even if it's just an essence of the Secrets of the Immortal Nicholas Flamel.