My Sister the Vampire #4: Vampalicious! by Sienna Merce

Ivy and Olivia can't lose each other again!

Even though twin sisters Ivy and Olivia, separated at birth, have only been reunited for a few months, they can't imagine life without each other. But Mr. Vega has decided to move to Europe―and he's taking Ivy with him! Oh, no! With Olivia's cheerleader optimism and Ivy's vampire craftiness, they're determined to come up with a plan that will keep Ivy and her dad in Franklin Grove. But what?