Here are some key sources of information about the Egyptian afterlife:
* The Pyramid Texts: These are the oldest known Egyptian religious texts, inscribed on the walls of pyramids from the Old Kingdom period (c. 2686-2181 BC). They contain spells and incantations designed to help the deceased king navigate the afterlife and achieve immortality.
* The Coffin Texts: These texts, inscribed on the inside of coffins from the Middle Kingdom period (c. 2055-1650 BC), were meant to be read aloud during the funeral ceremony. They provide more detailed descriptions of the afterlife journey and the dangers the deceased would encounter.
* The Book of the Dead: This collection of spells and hymns, compiled during the New Kingdom period (c. 1550-1069 BC), was intended to be placed in the tomb of the deceased. It contains instructions and prayers designed to help the dead person successfully navigate the underworld and gain eternal life.
* The Book of Amduat: This text, depicting the journey of the sun god Ra through the underworld, was intended to be a guide for the deceased. It describes the various challenges and obstacles they would face on their journey to the afterlife.
* The Book of Gates: This text, containing images and descriptions of the underworld, was intended to help the deceased identify and avoid dangers.
It's important to note that the Egyptians believed the afterlife was a long and complex journey, and there was no single "book" that contained all the information about it. Instead, their beliefs were expressed through a vast and evolving body of religious texts and practices.