This novella (The Double) is a provocative exploration of sanity, sense of self, and perception. Dostoyevsky cleverly employs mirrors to focus one's contemplation on self-reflection, and when the dust all settles, nothing is truly certain. Who is the doppelganger? Who is crazy? The beauty of this book is that the answers to these questions and more can be lengthily discussed, debated, considered and, ultimately, reserved for another read and another discussion.
I read this book as a part of Another Look Book Club, put on by Stanford University. The focus is on oft-overlooked, not-as-well-known classics which are short (<200pp). The discussion panel for this book included a Russian ex-pat, a Russian Literature professor and a Stanford Literature Professor. The discussion was lively and thought provoking, especially because each discussant had his/her own perspective and often it disagreed sharply with the others' perspectives. If you have a chance to look at the video of the discussion, you may enjoy it.