After reading the first four books of the vampire chronicles, Memnoch the devil is a pretty big disappointment. The first few chapters are promising and quite a good read but now i'm forcing myself to read it to the end, whereas, usually i can't put her novels down. It is way too theological, and seems to lose the vampire plot completely, i don't really see where it ties in.
It is well written, of course, and still has the emotion and atmosphere of an Anne Rice novel but is a bit tedious and hard to follow at times.
I would say read it if you plan on reading The Vampire Armand, if not i wouldn't bother (i'm 19, atheist and have not yet finished the book)
I love Anne Rice's writing i just think she ran away with the idea a bit or maybe its not my thing. I will still be reading The Vampire Armand