Here's mine:
Carson McCullers, The Heart is a Lonely Hunter and The Member of the Wedding [cheating by doing two]
Dodie Smith, I Capture the Castle
Julia Strachey, Cheerful Weather for the Wedding
Jack Kerouac, On The Road
Harper Lee, To Kill a Mockingbird
Funny how many of these are American, whereas our children's books (on the other thread) are very Brit-centric.
(Otherwise, I've got a bet on how many times the Brontes come up.)