My Sister the Vampire: Revamped! [antikvár]

Now that Ivy and Olivia have told their friends that they're twins, they have to come clean to their adoptive parents. But Ivy's dad doesn't even want to meet Olivia! When the vampire officials realize Olivia knows the truth about vampires, they demand that she pass three tests to prove she's worthy of sharing the secret. Yikes! One thing's for sure--if the sisters can get through this, they can get through anything!