In this delightful children’s picture book, Jilly is a little girl who loves Halloween because of all the candy. She can’t wait to go trick-or-treating and to attend her class Halloween party. She loves the holiday so much that she can’t stop thinking about it.

In the time leading up to her class party, Jilly notices that her teacher is acting strange. He keeps talking about candy and snacks, and every time he does, she thinks his eyes start to get a little green glow.

At snack time, her teacher appears to turn into a snack eating machine, eating all the kids’ snacks. His voice sounds robotic and his eyes now unmistakably glow an eerie green every time he eats someone’s snack. Jilly thinks he’s not her teacher Mr. Spack anymore, but Mr. Snack, an alien from a treat-deprived planet in another galaxy.

When snack time is over, everything seems to go back to normal and Jilly begins to wonder whether it really happened or if she just dreamed the whole thing.