Dear Editor, I'll bet you're sorry now...

From Ursula K LeGuin's website (courtesy M J Rose):
"The book is so endlessly complicated by details of reference and information, the interim legends become so much of a nuisance despite their relevance, that the very action of the story seems to be to become hopelessly bogged down and the book, eventually, unreadable." Go read the rest of the letter rejecting The Left Hand of Darkness here.