On The Edge (Sweet Valley High Book 40)

Headed for trouble...
Regina Morrow and Bruce Patman have been going together for months. But when beautiful, devious Amy Sutton is paired up with Bruce on a school project, she schemes to steal him away from Regina. Little by little Bruce's resistance to Amy's charm begins to crumble.
Regina is furious when she discovers that Bruce has been seeing Amy behind her back. Hurt and betrayed, she turns to Justin Belson, a troubled senior at Sweet Valley High. Regina's friends are worried. They think Justin and his crowd are bad news--it's rumored that some of them are drug users. Is Regina on a dangerous course?