The Bardo Thodol, commonly known in the West as The Tibetan Book of the Dead, is a terma text from a larger corpus of teachings, the Profound Dharma of Self-Liberation through the Intention of the Peaceful and Wrathful Ones, revealed by Karma Lingpa (1326–1386). It is the best-known work of Nyingma literature. In 1927 the text was one of the first examples of both Tibetan and Vajrayana literature to be translated into a European language and arguably continues to this day to be the best known.

In some schools of Buddhism, bardo or antarābhava is an intermediate, transitional, or liminal state between death and rebirth. The concept arose soon after Gautama Buddha's death, with a number of earlier Buddhist schools accepting the existence of such an intermediate state, while other schools rejected it. The concept of antarābhava, an intervening state between death and rebirth, was brought into Buddhism from the Vedic-Upanishadic philosophical tradition. Later Buddhism expanded the bardo concept to six or more states of consciousness covering every stage of life and death. In Tibetan Buddhism, bardo is the central theme of the Bardo Thodol, the Tibetan Book of the Dead, a text intended to both guide the recently deceased person through the death bardo to gain a better rebirth and also to help their loved ones with the grieving process.