Beverly Lewis 
No Grown-ups Allowed (Cul-de-Sac Kids Book #4) 

Jason Birchall can’t wait for Valentine’s Day. His parents are going away for the weekend, and Grandma is coming! Jason has big plans. Will he be able to sneak some of his mother’s yummy valentine chocolates? Can he trick Grandma into allowing him to change his bedtime?Strange things happen in the Cul-de-sac when Jason pigs out on gooey chocolates and stays up late for a scary show!