It has been ages since I read this book so I will quote the back of it:
"Peter Hatcher's summer is not looking good. First of all, Peter's brother, Fudge - the five year old human hurricane- has a plan: to marry Peter's sworm enemy, Sheila Tubman. Worse, Peter's parents have decided to rent a summer house next door to the Tubmans. Will Peter survive the summer? It may not be the vacation of Peter's dreams but as millions of Judy Blume fans know, it won't be dull."
Grade 2-5-- The Tubmans and the Hatchers return in this latest chronicle of the hilarious escapades of Fudge, Pete, and Tootsie Hatcher and Sheila "Queen of Cooties" Tubman. Their parents decide to spend their summer vacation in the woods of Maine right next door to each other--but "next door" turns out to be in the same house. Fast-paced mayhem becomes the order of the day as children, adults (including Grandma Hatcher and Grandpa Tubman), and assorted pets find themselves in daily (hourly?) predicaments. Not to be outdone in the madcap pace, Grandma and Grandpa announce their intention to be married. The story concludes with the solemn pact between Pete and Sheila that even though they'll be related, they will always hate each other. The story is filled with humor, and the upbeat mood is sustained at a hectic pace from first page to last. The uncomplicated plot is developed smoothly with just the right doses of surprise and laughter to keep readers turning the pages. Characters are credible, and never lose their identities