If you're gonna play or run Wraith, you've GOTTA have this book. Lots of setting info, insight into Harrowings (even if the mechanic is first-ed.), and, most importantly, new guilds and their corresponding Arcanoi. There's something deeply sinister about the Solicitors, something TERRIBLE about the Mnemoi, and something twisted about the Alchemists...but you need this book to use them! You'll thank me later, especially if you intend to run Ends of Empire.
[5 of 5 Stars!]