The document summarizes the book "Who Moved My Cheese?" by Spencer Johnson. It tells the story of two mice, Sniff and Scurry, who adapt well to changes in the maze when the cheese runs out, finding new cheese. Meanwhile, the other two mice, Hem and Haw, resist change and have difficulty adapting when the cheese disappears. The story is an allegory for coping with change in one's work and life. It teaches that one should accept and adapt to change rather than fearing it.