Survive the Night by Todd Ritter

Set in November 1991, Survive the Night follows Charlie Jordan, a college student who drops out after her best friend is murdered by a serial killer known as the Campus Killer. Seeking to leave town, Charlie arranges a ride with Josh Baxter, a stranger she meets through a college ride-share board. During their journey, Charlie begins to suspect that Josh may be the killer, leading to a tense and suspenseful ride .