Thirst no. 1 contains books 1-3 of Christopher Pike's The Last Vampire series. I picked Thirst no.1 up on a whim because the cover looked neat, and I wanted something interesting to read, and after all the male vampire drama I thought a female vampire would be neat, and I was pulled into the story instantly, and before I knew it I was done with the book, and ready for no.2. The book isn't perfect(insta-love). but despite that I still loved the book. In the beginning I found things to be just a little slow, but once it picked up I was hooked. 
 I found Alisa/Sita is an interesting character for sure. She made mistakes, and she could be selfish( I imagine a 5,ooo year old vampire might be set in her ways), but you'd definitely want her on your side in a fight ( girl can kick butt). She has a really interesting history, and I love her origin story--it's unique, and one of my favorite things about the series.