Who Moved My Cheese? by Spencer Johnson, M.D.

Co-author of the One Minute Manager and other One Minute books aimed at simplifying and getting the most of our lives.  This #1 Bestseller is a classic.  This one-hour read provides a powerful perspective that can significantly change those of us stuck in non-productive or even self-destructive life situations due to emotional inertia or fear.  It is certainly an indispensable tool for anyone engaged in soul searching or admitting his life can use some improvement.