A sexual sadist, his pleasure was torture and murder. He mocked authorities through encrypted notes, promising he would kill again. The toll may have reached fifty. He was never caught. Graysmith, who was on staff at the San Francisco...

When twenty-eight-year-old San Francisco Daily Morning Call reporter Mark Twain met Tom Sawyer at a local bathhouse in 1863, he was seeking a subject for his first novel. As Twain steamed, played cards, and drank beer with Sawyer (a v...