I don't have the book but I can sympathize with your problem. Sometimes it just helps to put it away for a day or a week and come back with a fresh mind. Would it help to explain the problem with the socks in deatail? Plenty of experienced sock knitters here.
And yes, I work over knitting problems (among others) as I'm falling asleep (or trying to). Sometimes I just have to tell myself to put down the needles and step away from the project.