Mary Higgins Clark pretty much never disappoints. I was actually surprised to find that this was originally published in 1977. It was only when I found myself asking why the characters were using payphones rather than cell phones that I looked up the publication date.
A good, fast-paced mystery. I picked it up off my shelves of books I pick up at thrift stores for $0.25-$0.50 while trying to decide what to read next, knowing it would only take me a day or two to finish. It was an engrossing story that kept me on the edge of my seat.
A masterpiece of literature it isn't, but a damn good read it is.