Here is a classic on the basics of Buddhism by Ven. Narada Thera. In its eleven chapter it explains: The Story of the Buddha; The Teachings (Dhamma) is it a philosophy? Is Buddhism a religion? Is Buddhism as Ethical system? Some salient features of Buddhism. Karma or the Law of Moral Causation. Rebirth. Dependent Arising (Paticca Samuppada). Anatta or Soul-lessness. Nibanna and The Path to Nibbana.
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