(This review may contain spoilers).
I wavered a lot while reading this book. On the one hand, the storyline was interesting and took new and creative turns. On the other... there were an awful lot of errors in the book that kept throwing me out of the story.
I liked the take on the Olympians and the elements of science fiction in the story. This wasn't a book that could fit neatly into a genre - it seemed to touch on all of them. I did like the first person POV, but I kind of thought that Hermes' telepathy was an excuse for other characters' thoughts to be revealed. There were several times when it was written as if from the POV of another character, even while remaining in first person.
I was disappointed to see Hades as the villain yet again, but pleasantly surprised that Ares didn't go down the same route. I also liked the fact that Ares didn't come across as some idiotic brute. Hermes outsmarted him fairly and I liked the way their relationship grew and formed, as well as the relationship Hermes had with his other siblings - Apollo and Hephaestus especially.
I liked the twist with Persephone, but I did think that the love between her and Hermes wasn't truly real. I didn't like her as a character and I felt that the whole reason behind what she became was solved really quickly and easily. I would have liked to see more of their relationship forming.
I liked the use of the Titans in the story, but I have to say, some of the things were kind of confusing. I'm not sure I truly understood the whole different time nodes, either. I liked the use of the myths, but there were several that were changed. For instance, in most mythology, Asclepius is Apollo's son. And Pan is Hermes'.
I liked the way Zeus was portrayed - as caring for his children, even while still not being a very good father. I thought that fit in very well with his character in myths. The whole wings thing was... interesting. I'm not sure why he had them, though.
I would be interested in reading more books in this series, but I'd like to see more developing of any romantic relationships. And less errors.