Vampire Island by Adele Griffin

Lexie, Hudson, and Maddy all have the same kind of troubles that you and I do.

Lexie has a deep and near-hopeless crush on Dylan Easterby, the cutest boy in her seventh-grade class. But with her too-long fingers and her love of poetry, she's afraid he'll never like her back.

Nine-year-old Hudson cares about the environment. He cares a lot about the environment. But his attempts to educate his fourth-grade class backfire in a way that gets them all recycling but but doesn't make them very friendly.

And eleven-year-old Maddy is convinced that there is something very strange going on in the house across the street. She's sure the von Kriks are up to something shady; she just hasn't figured out how to prove it yet.

But the three siblings are also different from you and I. Lexie is extremely strong, fast, and agile. Hudson understands what animals are saying, and he can transform into a bat at night. And Maddy is having a hard time sticking to the all-fruit, all-veggie diet her family has been on for the past four years...