4.5 stars 
 I came to this book not expecting much because I had read reviews pertaining to how 'horribly' Jennifer Fallon chose to resolve the series. Essentially, I daresay I had sufficient time to prepare myself mentally for a disappointing ending. 
 Unexpectedly, I find myself enjoying this book even more than the previous book, The Palace of Impossible Dream. The revelations that occurred in the book were reasonable and rightly integrates with hints provided in earlier entries of the quartet, revealing a well-thought out plot from the beginning. 
 The evolution of Declan Hawkes was a truly confounding element for the entire series. As revealed in her thesis (exegenesis) Introducing Mr Perky: Subverting the trope of immortality in contemporary speculative fiction, Declan Hawkes was not initially intended to be a major character, and certainly not a rival for the Immortal Prince Cayal, who was up until the end of Book 2 still the Hero of the series. 
 Declan's rise in prominance in Book 3 was especially disorienting. Perhaps to give Declan Hawkes room for romantic contributions to the storyline, Fallon maneuvered Cayal into behaving selfishly and immaturely, this is contrasted starkly against Declan's undying devotion to Arkady, in the process forcefully skewing audience sympathy towards Declan. That said, Declan's continued to play a very prominent role in Book 4. 
 Although the end of BOok 4 did not give me the level of closure I want, I would gladly read any future follow up to the series. As Fallon clearly demonstrated over the past 4 books, immortality is a very complicated concept in her world and it cannot be easily resolved within a few chapters. Only a full series would provide justice to Arkaday's adjustment to her current situation and the new adventures of a contemporary King Tide. 
 As of now, I am contented with how the series concluded its theme of immortality and the origins of immortals. Compared to how The Deathly Hallows ended, this is definitely an improvement.