She lives above an Art Deco theater in San Francisco's Sunset district with an old long-haired cat, a harpsichord and more yarn than a loading dock. The FBI and city police call her the Yarn Woman. She's their textile forensics expert.In her first recorded case, 'Ghosts of the Albert Townsend, ' Ruth has only a blood-soaked nineteenth century shawl to unravel the link between the resurfacing of a ghostly schooner just offshore and the severe wounds...