Without going into detail about the plot, let me just say that in Abandoned McFadyen has created a killer who doesn't kill for thrills, sex or even for power -- it's far more twisted than that. The concept of this plot is quite complex, and McFadyen succeeds quite well in executing the plot in the first quarter and last quarter of the book. During these parts of the book the story is intense and had me on the edge of my seat. However, I found that the second and third quarters of Abandoned dragged on with insufficient action and thrills being provided. Further, while McFadyen continued to provide this reader with a deeper understanding into the psyche of his main character, FBI special agent Smokey Barrett, and into his psychopathic killer, McFadyen gave short shrift in Abandoned to several of the key supporting characters that helped make his previous three books so memorable for me (i.e., Shadow Man, The Face Of Death and A Darker Place). As such, I'd strongly recommend to anyone considering reading Abandoned and who has not previously read at least one of McFadyen's other books, that they first read at least Shadow Man in order to begin to understand and to develop an appreciation of McFadyen's richly developed characters. I don't believe a new reader will get this sense of appreciation from beginning with Abandoned, and will probably not care much about the characters that were so richly devloped in McFadyen's other books (e.g., Callie Thorne, Alan Washington, James Giron, etc.); which, in turn, will lessen their overall appreciation of the book. In net, while Abandoned has its flaws and while it is the weakest of McFadyen's four thrillers, it is still a book well worth reading.