The Dead Lifeguard is a novella written by R. L. Stine. It was first published in 1994 and was the sixth book in the Fear Street Super Chiller book series.
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In too deep...
The lifeguards at North Beach Country Club know they’re lucky. While other kids are flipping burgers, they’re sunning themselves by day and partying by night. So what if some people say the place is cursed, haunted. This is the life!
And then, one by one, the lifeguards start to die horrible deaths. Someone—or something—evil is stalking them. They all know how to save other people’s lives…but who will save theirs?