The Book on Mediums

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The Book on Mediums or Mediums and Evokers' Handbook (a.k.a. The Mediums' Book —Le Livre des Médiums, in French), is a book by Allan Kardec published in 1861, second of the five Fundamental Works of Spiritism — the philosophy Kardec had been publishing — being the tome in which the experimental and investigative features of the doctrine were presented, explained and taught.