RIDGEWOOD With its velvet ropes, tight schedule, and high-strung aides, Hillary Rodham Clinton's book signing at Bookends on Friday was shaping up to be an event devoid of actual human emotion. But that was before the author strode into the room. Cameras flashed. Spines straightened, and hands clapped. The first few dozen of the hundreds of people in line at the bookstore leaned forward to look, and there was Clinton - Democratic New York senator, author, former first lady, famously humiliated spouse, and perhaps future presidential candidate - beaming her megawatt smile around the room. "Thank you for coming!" she...