Unreliable Narrator

I just read my first book with an unreliable narrator.  Well, my first outside of school.

I never realized just how much I trusted the narrator.  I mean, the whole time we're talking about a guy who died, and I'm trying to make the other people fit, and it's just not working.  But still, the narrator never occurs to me!  You're supposed to trust the narrator to tell you the truth...and to tell you every thing they know!

Leaving out that you snuck down the stairs and killed your husband is no good for the reader.

I have no idea what I thought of the book.  I enjoyed it, though it was fraught with oddities.  But still... the unreliable narrator makes me squirm uncomfortably.