"The Spirits' Book" is the foundational work of Spiritism, a school of thought first established in France in the mid-nineteenth century by the French educator Allan Kardec. Currently, Spiritism includes over fifteen million adherents, the eleventh largest spiritual following worldwide, ahead of more historically traditional religions such as Judaism (twelfth) and Jainism (fourteenth). This is the first Chinese translation of "The Spirits Book" in traditional characters. "The Spirits' Book" represents a philosophical guide for real people, encompassing the analysis of all the fundamental questions underpinning human existence. According to Socrates, "the unexamined life is not worth living." In this sense, "The Spirits' Book" may very well be one of the most worthwhile companions you will ever have in your life.