Here is my favorite quote from Montana 1948, that I think will give you a sense of the plot and the voice:
"What finally lifted me from the floor and moved me back down the stairs? It was trivial, yet it bore out what a boy I was when all this was going on. In the kitchen was chocolate cake. My father had stopped at Cox's Bakery the day before and bought a cake, and it was sitting on the counter. A murderer may have been locked up a floor below and the molecules of his victim's dying breath still floating in the air, yet these were not strong enough finally to stand up to my boy's hunger for chocolate cake."