Books about or involving alchemy: an ancient branch of natural philosophy. Alchemists attempted to purify, mature, and perfect base metals into noble metals, namely gold, the creation of an elixir of immortality, and the creation of panaceas able to cure any disease.
Books about or involving divination: the attempt to gain insight into a question or situation by way of a process or ritual. Diviners ascertain their interpretations of how someonee should proceed by reading signs, events, omens, or through alleged contact with a supernatural agency.
Books about or involving numerology: the belief in the divine or mystical relationship between a number and one or more coinciding events. It is also the study of the numerical value of the letters in words, names, and ideas.
Books about or involving tarot card reading: fortune-telling or divination where practitioners use tarot cards purportedly to gain insight into the past, present or future. They formulate a question, then draw cards interpret them for this end.