Crave is about a girl named Shay, she has a blood disorder, which makes her weak and tired all the time. Her stepfather, a scientist, has a new blood transfusion treatment for her. It seems to be working the only drawback is the weird visions she gets from it. The visions are of someone else's life. When Shay finds out the truth everything changes. 
 It seemed to take me forever to read the book. I know the back doesn't explain much. The book is about vampires. I didn't like the end, it just ended. The second book is called Sacrifice. I'm looking forward to reading it.