was never codified and no two copies of the work are exactly the same.
They were created specifically for each individual who could afford to purchase one as a kind of manual to help them after death.
It was just one of a series of manuals composed to assist the spirits of the elite dead to achieve and maintain a full afterlife (26).
The afterlife was considered to be a continuation of life on earth and, after one had passed through various difficulties and judgment in the Hall of Truth, a paradise which was a perfect reflection of one's life on earth.
Lucas and Clementine live peacefully in their isolated country house, but one night they wake up to strange noise... and a group of hooded assailants begin to terrorize them throughout the night.
In the same way that publishers in the present day offer Print on Demand books or self-published works, the scribes offered different "packages" to clients to choose from.
They could have as few or as many spells in their books as they could afford.
They also served, however, to provide the soul with fore-knowledge of what would be expected at every stage.
Having a Book of the Dead in one's tomb would be the equivalent of a student in the modern day getting their hands on all the test answers they would ever need in every grade of school.