Sink your teeth into Sienna Mercer's sixth super-girly vampire story for girls. Olivia is a vegetarian. Ivy is a vampire. And they're twins?!? The twins are travelling to Transylvania! Olivia's really nervous because she's meeting her vampire family for the first time (there's a lot at stake). Plus it doesn't help that she'll be there for Valentine's Day and her new boyfriend Jackson, the hot movie star, doesn't seem bothered that he won't be with her. But it turns out it's Ivy who feels out of place, despite being surrounded by vampires! And Olivia's been noticed by Prince Alex, a smooth-talking handsome vampire with an eye for non-vamps. Could it be love at first bite? And what about Jackson?! These kinds of situations only happen in My Sister the Vampire. A vampire book for girls who want to read about young love and innocent paranormal romance.