Chloe and her twin brother, Damian, have become the wards of their aunt and uncle, whom they have lived since their parents were both killed unexpectedly. In the fantastical world of Petros, a world that is well organized and heavily controlled by the Fantasmata, dying early is a rare event. Most citizens expect to live into their late 70's or early 80's when they reach the age of Coronation.
Chloe's aunt and uncle are not very involved in the twins lives, and provide little beyond a place to sleep, which makes Chloe wonder why they have done anything to help her and Damian celebrate this birthday. After experiencing a dream-like vision while napping in her treehouse during the party, Chloe awakens to find someone has dropped off one more gift for her - a ticket to the newly-opened museum. Being a fan of ancient history, Chloe immediately heads to the museum, which is where the story begins to unfold. (Ancient history, for the world of Petros, is based heavily on ancient Greek mythology, with characters such as Apollo, Hermes, Hades, and more.)
To share any more would give away some of the plot, so I'll leave it here for now. This book is definitely worth 4.5 stars, and I give the author a lot of credit for doing the research required to create characters that matched those of mythology. Tyler is a fantastic story-teller, and other than a few minor inconsistencies (such as the inhabitants of Hades having had all of their memories removed, and yet are still able to communicate clearly, when speech is a memorized skill), there was very little to not like about this book. I look forward very much to reading both the prequel to this book, and the upcoming sequel, which I believe launches next month (Feb 2018)