Nancy A. Collins' series featuring monster-hunting vampire Sonja Blue has a few crossovers bringing it into the CU. In this particular novel, Sonja visits a New Orleans voodoo priestess, whose library includes a copy of Legendre's Le Livre d'Absinthe. This is obviously a reference to voodoo houngan Murder Legendre from the horror film White Zombie. It's worth noting that the Sonja Blue novel A Dozen Black Roses, published by White Wolf,has Sonja encountering the Camarilla vampire sect from White Wolf's role-playing game Vampire: The Masquerade. The game gives a version of the nature of vampirism that is very different from most accounts set in the CU, as well as a unique take on Dracula that can't really be interpreted as a soul-clone. Therefore, A Dozen Black Roses must feature the CU version of the Camarilla, and does not import the continuity of Vampire: The Masquerade wholesale.