The Dare
R. L. Stine
Johanna Wise has always longed to be part of Dennis Arthur's rich, popular crowd, and she can't believe it when he finally asks her out. She thought she'd do anything to keep Dennis, but when he dares her to kill their teacher, she's not so sure. Will she really kill for love?
Shadowblood (Book Four of the Terrarch Chronicles)
William King
An army of undead monsters ravages the land.In order to overcome the sinister power behind them, Rik must master his birthright as a Shadowblood assassin under the tutelage of his deadliest enemy, his half-sister Tamara.