Nicholas Sparks---a good author, 7/10.
Stephenie Meyer---My 3 week old neice could write better. NEGATIVE 20,438,509,280,932,305,839,482,129,827,012,851,230,985,112,390,812,398,512,938/10
Meg Cabot---I have never read any of her books.
JK Rowling-amazing, extraordinary writer. 1,000,000/10 (okay, okay, 10/10)
Because JK Rowling is the best author alive, Stephenie Meyer can't write a book that has a plot (or even something that closely resembles one), and Nicholas Sparks is a good author just there are some I like better. Obviously I can't judge Meg Cabot as I haven't read her books.