What do these romance novels — featuring ghosts, Greek goddesses, a cardiologist, a fisherman, an astronaut and a Tang dynasty courtesan — have in common? Millie von Platen Is there any real dating in romance novels anymore? Or is it all fake? This is not the first time a trend has reached maximum genre saturation. Think 1990s paranormal (vampires and werewolves and fays, oh my!), and the feverish rise and fall of Goths in the 1970s, to name two. Fake dating is suddenly everywhere you look. Like all romance trends, what's most interesting is seeing the ways authors finesse the raw material to create distinct emotional effects. It's like an episode of "Chopped": Everyone has the same basket of ingredients, but how they work with them makes all the difference. For romantic comedy, we have Nisha Sharma's buoyant DATING DR. DIL (Avon, 364 pp., paper, $12.79) , a retelling of "The Taming of the Shrew" by way of Bollywood musicals and second-generation immigra...