Vampire Bestiary

[Khisanth the Ancient]

What I might do is just make that epic 'appendix' available as a small (24-32 page) pdf in its own right though, to avoid confusion.

That sounds good. And then when you compile it all you can add it at the end: Mountain → Castle → Temple → Appendix (you could call it something like 'Sanctum of the Blood Goddess' to go with the pulp-type feel).