Try Roald Dahl's short stories for adults- Kiss Kiss, Uncle Oswald, Switch Bitch....
Don Camillo is funny too
Lust for Life by Irving Stone (Vincent van Gogh biog) is written like a novel, very light, though I think the slant's a little much really (van Gogh as a childish genius who wasn't very self aware and just stumbled into things).
Chaim Potok is fab....I recommend him all.the.time. Not exactly light but very worth a try! Try The Chosen or the Gift of Asher Lev. Very readable, very sympathetic characters.
Travel writing? Patrick Leigh Fermor....
I used to really like Sophie Kinsella, I still think she's fab
people who say she's too repetitive or Becky is just too silly to be believable are missing the point IMO...
What about kids books? Chalet School, beluv'd by MNetters? Or Jennings, hilarious. The Thief Lord and Crusade in Jeans are good too.
Hmm light stuff....nonfiction books about stuff like the Great Exhibitions, turn of the century, Renaissance?
Nancy Mitford!! perfect vintage chick lit
also Mitford biographies are good reads too. And her history books (only read Fred the Great and Voltaire in Love, think she wrote one or two more).
Have you tried Harry Potter at all?
happy reading!