Um, from the first page:

"... I should try not to be so reserved, it was too easily interpreted as a form of arrogance."

Ouch, that hit's close to home!

"Our marriage was formed by the things Christopher knew and the things I did not."

"Our marriage was formed by the things Christopher knew and the things I did not."

But really, the nameless narrator seemed to know quite a bit more than we were led to believe.  She knows her husband is unfaithful.  She knows they are separated.  She knows her husband's family never liked her.  What she doesn't know, is where he might be.

Christopher's whereabouts is the central mystery of the novel, but I really don't consider this to be typical of the genre.  The writing style was almost stream of consciousness, very little dialog.  You learn about the marriage and consequent separation through the narrators memories and thoughts.  I was more drawn to how she lived her life, drifting along waiting for a push in any direction.  I don't want to give anything away, you really need to read this and experience it yourself!  It's a quick read, made quicker by not being able to put it down and walk away.