Vampire's Promise Series by Caroline B. Cooney

Cheerleaders are beautiful, popular and exciting - girls that Althea longs to be. But Althea is nobody - she gets no phone calls, shares no laughter and has no friends. Then one day she meets him, a vampire who offers to make her a cheerleader in exchange for a simple bargain.

When you make a deal with a vampire, there's no chance to change your mind. Or is there?Devnee is tired of being ignored. Tired of feeling ordinary. All she wants is to be beautiful. If she's beautiful, everything else will fall in to place: popularity, friendship, even love.Devnee's family has just moved into a new house--a house with a vampire in it. He can grant Devnee's wish, but there's a price. Is she willing to pay it?

Six teens spending the night in a haunted house must make a chilling choice in order to gain their freedom from the vampire imprisoning them--choose the one among them who will be the vampire's next victim.

This collection of all three books in the trilogy called The Vampire's Promise should not be confused with Fatal Bargain, the third book of the series, which was originally titled The Vampire's Promise.