What I loved: The books are heavily introspective and delve into each character in a way that makes them more whole, flawed, and lovely. I particularly appreciated the insight into Nick in this book, and the beautiful thoughts of Nick, as well as Ambrose, Theo, and the other key characters. There is something really special about meeting these characters in a book, and Brennan really takes us deeper into their psyche and thought processes in a way that enhances the characters we know on the surface from the show.
This book focuses a lot on love, its necessity and its complexity. A lot of characters are driven by love, even if they don't want to be, and their other thoughts are in conflict because of it. There is the love of friends, the love between former-lovers-now-friends, between family, and between the families that people make. All of these are complex, beautiful, and so genuine in the book.
There is also a nice touch of adventure, with the quest(s) that the "Fright Club" (e.g. Sabrina, Roz, Harvey, and Theo) go on with the Lady of the Lake to find the tools they need to rescue Nick. I also really appreciate the touches of humor throughout, as there are subtle touches of comedy among the macabre. There are also some really insightful/thought-provoking moments throughout as well. A particular favorite of mine is the side conversation about the inherent misogyny of the Phoenix in the X-Men movies, with how powerful women need to be subdued/destroyed.
Final verdict: PATH OF NIGHT is an excellent companion book to the Netflix show that gives us deeper characterizations and new insights into the characters we love. Highly recommend for fans of the show or for fans of thought-provoking YA fantasy.