The Last Vampire series consists of books written by Christopher Pike and chronicles the life of the 5,000-year-old "last vampire", The titles were originally released under the "The Last Vampire" series name, but when recently published was changed simply to "Thirst". Several previously released books were compiled together to make up earlier volumes of the "Thirst" series. The last book written in 2013 was called "Thirst no. 5: The Sacred Veil", although Christopher Pike has confirmed on his Facebook page that there will be a sixth book. The books are highly controversial as they reference the beliefs of long held Hindu, Buddhist, Jain and Sikh ideals, including stories about Rama, Sita and Krishna.
As the story begins, Alisa arrives at the office of a man named Michael who lied to her, invited her. He identifies himself as a private investigator. She tries to find out about a guy named Slim, but her best shot is Michael's computer. Alisa then enters high school as a student named Lara Adams and befriends Ray. She also befriends another young man named Seymour Dorsten. She uses Ray to get information from his father's computer. She lets herself be trapped by the unknown client's men. Unfortunately, it isn't easy to escape. After learning what she can, she kills Slim and some of his crew (the rest escape in a shootout with the police).
A flashback narrates Alisa's life and explains who Yaksha is. In 3000 B.C. Sita was born in India. When she was seven years old, a disease struck her village, and most of the villagers died, including her closest friend who was pregnant with a child. A traveling priest from a different religion convinced the elders that he could drive away the disease by performing a ritual; it involved invoking a demon into the recently deceased corpse of Sita's friend. During the ceremony, the priest called forth a yakshini (demon) which killed the priest. Only a handful of the male villagers saw the demon kill the man and then supposedly vanish. But Sita, hiding in the bushes, understood that the demon had actually entered the corpse of the child, still inside his mother. Before vanishing, the demon seemed to stare straight at Sita though she is hidden behind a rock. When her father rushed to save the child from its mother's womb, Sita ran forth and stated that it is not the child that is moving, but the demon possessing the child's corpse.
Her father decided to let her choose to let the child to live or die but she was afraid and confused. He said the only way to find out if it were evil or not was if they let it live. The father saved the child and Sita decided to name the child "Yaksha", meaning "begot from a Yakshini." Yaksha grew to be a beautiful man in a short period of time, who'd always had an eye for Sita. By this time, she was grown up as well, and married to Rama, her husband, and even had a daughter named Lalita. It was about that time the men that had witnessed the long-ago ritual vanished, one after another, including Sita's father. One night, after her father disappeared, Sita was awoken by a strange noise, and upon leaving her home, was attacked and dragged away by Yaksha. He explained what he was, though the word for vampire did not exist then. Some of the men were with him, transformed as he was (though being the first, he was forever more powerful than any of them, including Sita). He convinced her to join him, threatening to kill her sleeping husband and child if she did not.