"Which part of a book is hardest to write: the beginning, middle, or end?"
I was on a panel at Wellesley Books a few months ago, and when the events coordinator asked this question, I thought the answers would be boringly uniform. Obviously, the middle is the hardest part to write!
But apparently that's just me. For some writers, it's the beginning -- especially in fantasy, where you need to establish your world while avoiding the dread inof-dump. For others, it's the ending, which has to satisfy the reader -- and which will establish their lasting impression of the book. Or, yes, the middle, where you have to connect that beginning and end while keeping all the strands of the characters, plot, and world-building straight. (Or twisting them exactly the way you want!)
How about you? Which is hardest for you to write? (And don't say, "All of them." It may be true, but it's still cheating!)