17. The Last Vampire 5: Evil Thirst, by Christopher Pike
18. The Last Vampire 6: Creatures of Forever, by Christopher Pike

Sita, the last vampire (except not quite) spends the first book hunting her 5-month-old daughter, who looks 20 and acts like Kali, the Dark Mother of Hinduism, in order to keep an ancient prophecy from coming true. Not all is as it seems, however.

In the second book (which was originally the final book in the series, until the vampire craze of the 2000s inspired Pike to write more books), Sita travels back in time to stop a great evil from taking place, then goes back to her origins 5,000 years ago.

At the end of the book, it is revealed that Sita's adventures were all written by one of the characters, Seymour, who is dying of HIV.

"Oh, you can’t help that," said the Cat: "we’re all mad here. I’m mad. You’re mad."
"How do you know I’m mad?" said Alice.
"You must be," said the Cat, "or you wouldn’t have come here.”

- Lewis Carroll, Alice in Wonderland