The worst night ever / Dave Barry ; illustrated by Jon Cannell.

Enhanced descriptions from Syndetics:

Wyatt Palmer was a middle-school hero, but that doesn't count for anything in high school. When a ferret goes missing in this hilarious follow-up to The Worst Class Trip Ever , Wyatt and his friend Matt find themselves as unwanted guests at what turns into the Worst Party Ever!



Last year, Wyatt foiled a plot against the president of the United States and became the hero of middle school. But now he and his friends are in Coral Cove High School--home of the Fighting Conch--and Wyatt is a hero no longer; he's just another undersized freshman, hoping to fit in, or at least not be unpopular. Things start to go wrong when Matt Diaz, who is Wyatt's best friend but also unfortunately an idiot, decides to bring his pet ferret, Frank, to school. Through an unfortunate series of events Frank ends up in the hands of the Bevin brothers, who are the most popular boys at Coral Cove High, but are also, as Matt soon discovers, the nastiest. When Wyatt and Matt try to get Frank back, they concoct a plan to attend a party for the cool clique at the Bevin's waterfront mansion and stumble onto the Bevin family's dark and deadly secret. That's when Wyatt learns that some things are worse than being unpopular in high school. MUCH worse.