Victim Six ($5.11 Kindle), by Gregg Olsen, is free in the Sony store, for those who have a nook, Sony or other reader that supports DRM'd EPUB (not Kindle compatible).Book Description
The bodies are found in towns and cities around Puget Sound. The young women who are the victims had nothing in common--except the agony of their final moments. But somebody carefully chose them to stalk, capture, and torture. . . a depraved killer whose cunning is matched only by the depth of his bloodlust. But the dying has only just begun. And next victim will be the most shocking of all. . .
As always with the Sony store, you'll have to find the book in the Sony Library software, as their web page doesn't link to their store.
