Book (Paperback) - Killer's Kiss by R.L. Stine

[Simon Pulse] Fear Street -- where your worst nightmares live... Delia and Karina are always competing. From getting the best grades, to being the most popular, to dating the cutest guys -- they always fight for the top spot. This year, they both want Vincent -- the hottest guy at Shadyside High. Karina's determined to get Vince. She'll do whatever it takes. And if she can't have him, she'll make sure no one else can either.... Including Delia.