The Murder of Roger Ackroyd by Agathe Christie

I read this years ago, and when I finished it I threw it across the room in disgust. But my book club was looking for a challenging mystery, so I suggested this. Let me just say this - unreliable narrator. Probably best example I have ever read. So I read it again, knowing the ending, just to see what sense I could make of it. The ending still made me mad!