If you log on to eBay or murderauction.com these days, you will find a variety of "murderabilia" on sale for anywhere from $5 to $10,000. This might seem ghoulishly commercial, but it is just one manifestation of America's century-long obsession with serial killers. This compulsive preoccupation and its use in American culture is the subject of a new book by UB's David Schmid.