We have all experienced unexplainable occurrences, such as thinking about an old friend just before the phone rings and it happens to be that old friend. Many people have had bizarre dreams that days or even years later seem to have been a premonition of actual events. And there are meaningful coincidences or, in the parlance of Jung, synchronicities, that span generations, such as the fascinating parallels involving John F. Kennedy and Abraham Lincoln. ''The Power of Coincidence'' reveals that such occurrences are not merely insignificant episodes of random chance, but are important pieces in the puzzle of our lives. If we solve the riddle of these mysterious occurrences, their meanings can have a positive impact.