"Michel Houellebecq's Serotonin is a caustic, frightening, hilarious, raunchy, offensive, and politically incorrect novel about the decline of Europe, Western civilization, and humanity in general. Deeply depressed by his romantic and professional failures, the aging hedonist and agricultural engineer Florent-Claude Labrouste feels he is "dying of sadness." He hates his young girlfriend, and the feeling is almost certainly mutual; his career is pretty...