It was an interesting story about a group of strangers having strange things happen to them and they're all drawn to a hotel they stayed at two summers previous. The reason behind the "weirdness" is another group of strangers.

I had read it years ago, but enjoyed rereading it.

Especially enlightening was the author's new afterward. He explained how even though he had published a number of books before this one he decided to do this one on spec and write the book he wanted to write. He didn't plot it, only had the situation and jumped off the cliff, so to speak, writing it and discovering the story as he went. This went on to be his first hard cover best seller and established his method of writing books in the future.