Faceless is the third book in the Nameless series. You should read Nameless and Heartless before starting this book.
As in the previous books, Faceless revolves around a magical family of cousins (and their significant others). All of them are young people, and most are starting to put together a framework of how they think they want the rest of their lives to work out.
To me, one of the things that this book is about is that the choices people make – out of love, or fear, or desperation – have consequences. What happens as a result can affect not only the person who made a choice, but also the lives of other people. It’s a important piece of wisdom that some people do not learn until after they have destroyed something or someone they love.
Heartless is the second book in the Nameless series. You should read 
In Nameless, Matthew Rossi created a detailed world where vampires exist and magic is real. Magic can be strengthened by either pain or pleasure – it’s the intensity that matters. Those who use magic can conjure up monsters or heroes from mythology (be it from Greek mythology or modern comic books) and send them into battle.
One of the things I love about books is that they are an excellent place to escape to when the real world seems dark and dire. In Things That Never Were, Matthew Rossi gives the reader plenty of interesting, incredibly detailed, glimpses into what the world might have been like if you take what we know of history, twist it around, and see where it goes from there.