The Egyptian Book of the Dead is not a single fixed text but a collection of approximately 200 spells — called chapters or utterances — drawn from a much older tradition and compiled over roughly two thousand years. No two copies are identical: each was commissioned by or for a specific individual, tailored to their needs and illustrated with vignettes (paintings) depicting the scenes described. The most famous copy — the Papyrus of Ani, dating to around 1250 BCE and now in the British Museum — is also the most beautifully illustrated, running to nearly 78 feet of papyrus.
The tradition from which the Book of the Dead grew is ancient beyond measure. The Pyramid Texts — carved on the interior walls of Old Kingdom pyramids from around 2400 BCE — are the oldest religious corpus in the world, and the Book of the Dead is their democratised descendant. Where the Pyramid Texts were exclusively for the pharaoh, the Coffin Texts (Middle Kingdom, c.2100–1700 BCE) extended their protection to nobles, and eventually the New Kingdom Book of the Dead made the spells available — for a price — to any Egyptian who could afford to commission a copy. Osiris democratised immortality — and the Book of the Dead was the practical technology of that democratisation.
Copies were produced by professional scribes who left blank spaces for the owner's name — often filled in incorrectly, with the wrong name or gender, suggesting a degree of mass production that prioritised speed over accuracy. This small detail humanises the tradition: ancient Egyptians, like modern people, sometimes took shortcuts with matters of cosmic importance.