Misery, of course. That was the thread that ran through everything, but, true thread or false, it was so goddam silly.
As a common noun it meant pain, usually lengthy and often pointless; as a proper one it meant a character and a plot, the latter most assuredly lengthy and pointless, but on which would nonetheless end very soon. Misery ran through the last four (or maybe it was five) months of his life, all right, plenty of Misery, Misery day in and Misery day out but surely that was too simple, surely Oh no, Paul. Nothing is simple about Misery. Except that you owe her your life, such as that may be… because you turned out to be Scheherazade after all, didn't you?