This series was kind of fun. It's about twin girls, Ivy and Olivia, who were separated at birth. Somehow, one was born a vampire and the other a human. Everything they think they know about themselves changes when Olivia moves to Ivy's hometown. The vampires in the books aren't like the normal bloodsucking vampire stereotype. They are born vampires, and have found a way to live in a normal community.
1 - My Sister the Vampire #1: Switched (My Sister the Vampire) - Olivia moves to a new town and discovers that she has a twin sister named Ivy. Who just happens to be a vampire.
2 - My Sister the Vampire #2: Fangtastic! (My Sister the Vampire) - A celebrity reporter is out to prove that Ivy's hometown is overrun with vampires.
3 - My Sister the Vampire #3: Re-Vamped! (My Sister the Vampire) - Olivia and Ivy's secret twin identity is out, and Olivia must prove herself worthy to know of the vampiric culture.
4 - My Sister the Vampire #4: Vampalicious! (My Sister the Vampire) - Ivy and Olivia find out the truth behind their parentage and try to convince Ivy's dad not to move to Europe.