Mayhem: Jack's mind and The Overlook

At this point of the book, there is no doubt that Jack's mind tries to hide traits and glimpses of darkness. The hotel does not help him at all; within its walls there are soft and whispering voices that want to be heard, that want to take over the new writer's concentration. Drought gets harder as we enter these chapters, as we see Jack drinking nothing while he talks to the invisible barman of the Goldcn Ball Room, we can see how much the isolation is affecting him and that hallutinations are part of the package.
He drifts apart from Wendy and Danny, who is also struggling to deal with The Overlook's charm. Although Jack seems to be working on a masterpiece of play or book, there's something that is not quite matching their new lifestyle, and he begins to act as a child playing hide and seek with someone that is not aware of being part of that game. He ensconces the radio batteries, the tractor keys, and cuts off the telephone cables, because he knows that eventually someone would lose its mind and getting crazy appears to be an attractive idea.
Jack's duality is often seen in the middle of the book, which is where we are right now. There is a part of him trying its best to be a sane, working, loving and decent husband and father; but, on the other hand, we can find the violent, anxious, alcoholic and agressive man who is frustrated with his fate and is about to burst any time soon. It is almost a Dr. Jekyll and Mr. Hyde situation, with the difference of influential factors to the violent behaviors, which are isolation, not drinking booze, a bad relationship with his family, and others.
The monster is looking out the window, and its about to enter to the precious and mystique Overlook.