If you plan on running Curse of Strahd (and/or just love the setting like me), this book is a wonderful addition that can really help make the Demiplane come alive. Very entertaining to read as well, had a good chuckle when I came across the "Man of Flames"
On a side note, by the time I finished deciphering the encoded messages I was 1) filled with so many ideas to add into a COS campagin and 2) able to decode withoiut looking at my table.
It took me 3 actual days. You guys are on my list.
[5 of 5 Stars!]