Fear of China is back. But it's a nebulous fear, and this creates both an opportunity and an obstacle for the male and female anti-heroes of Christopher Buckley's latest look at the surreal world of lobbyist, the uneven but occasionally hilarious "They Eat Puppies, Don't They?" Both characters are eager to whip up anxiety about the Chinese military threat in hopes that Congress will fund development of a costly new weapon. They quickly realize, though, that China is different from radical Islam when it comes to generating dread.