When it comes to romantic comedies, my favorites are from the 30's and 40's, the screwball comedies like It Happened One Night, which made witty banter and slapstick situations the sexiest things on screen.
It's always a treat to find an author whose books evoke the feel of those movies. Jennifer Crusie is one such author, especially when it comes to dialogue. It crackles and pops on the page, and you almost can't resist reading a little bit out loud, just because it's so much fun to say. My favorite of hers is Faking It, about an art dealer desperately trying to keep her art-forging past under wraps, and the reformed con man who might blow it all sky-high.
Another author, whose books have a more slapstick feel, is Susan Elizabeth Philips. Her characters have dressed in giant beaver costumes, starred in circuses, and manipulated the tabloids, all for the craziest of reasons. Many of her books are also set in the world of professional sports. One of her recent ones is Natural Born Charmer, about a football quarterback who picks up the strangest hitchhiker he's ever met, and discovers that she might be just the dose of reality that he needs.