All Night Long (Sweet Valley High #5‪)‬

Is Jessica as grown-up as she thinks she is?

Elizabeth Wakefield knows her beautiful twin is more than a match for almost any guy out there. Most guys easily fall prey to Jessica's seductive charms. But Scott Daniels, Jessica's latest love, may be more than she bargained for. He's much older and much more experienced than anyone Jessica's ever dated.

When Jessica sneaks off to a college beach party with Scott, Elizabeth's afraid of what might happen. And when her twin sister isn't back by morning, Elizabeth fears the worst. Where is Jessica? Why has she stayed out all night long?
All Night Long is an original Sweet Valley High story by Francine Pascal.