The Ripper's time

"History professor Henry Willows is in love--in love with Catherine Eddowes, the fourth victim of Jack the Ripper. Although over a century distant, Henry's obsession knows no bounds. With the aid of an ingenious physicist, Henry achieves his raison d'être: a means to travel back in time, stop the world's most infamous serial killer, and save the woman he loves. But the fabric of time isn't easy to change ... and the Ripper has plans of his own."--Back cover.