Curtis Sittenfeld's new collection of stories is uneven. "White Women LOL" tries to be a riff on the Central Park Birder incident, but the piece has very little to say. Also, a "sequel" to "Prep" just meanders and sputters without a payoff. But--elsewhere--certain characters pop off the page. I keep thinking about a woman who has memories of her adolescence. In college, she studied the viola. She was self-conscious about her coed bathroom, so she trained herself to poop before anyone else was awake. But a particularly cruel male neighbor discovered her secret--and made inferences about her self-loathing--and began stalking her during bathroom trips. This is such a strange situation. Everyone poops; the poop itself should not be a source of shame. But the bully has extraordinary power over the violist. I couldn't anticipate where all of this was headed. I also felt caught up in the world of a liberal film producer who has a strange assignment. A c...