Lonely Christopher (yes, that's his name, and yes, he might be a hobo) is the latest discovery of Dennis Cooper's Little House on the Bowery imprint, which spotlights unique young literary voices. The Mechanics of Homosexual Intercourse, Christopher's new book of short stories, is a strong, variegated collection packed with strange situations. There's a horse in the kitchen, and an emaciated Amish maid named Cindy Crawford can't do anything about it; Pokémon characters witness drunken bestiality. But each story shares a heartbreaking compassion for its characters' alienation. (Pilot Books, 219 Broadway E, upstairs, 229-7181, 7 pm, free)