The spirit is willing, but the back hurts and around the neck and shoulders too

Oh i wish i could spend 6 more hours the way i have, but alas i'm a wimp, will crawl into bed in a room 20 degrees warmer and keep on reading, i HAVE to at least do that much, but just to make it clear i can only read my physical books in the living room, reading in bed is KINDLEtastic.