The "Book of What is in the Underworld". It describes the journey undertaken by the solar barque through the 12 hours of the night to reappear the next morning.

The Amduat, also called "Book of What is in the Underworld", is a corpus of funerary texts and vignettes. It describes the journey of the sun god through the 12 hours of the night, from its setting to its rising in the morning.

The book (papyruses) ‘That is in the Netherworld'.

A text describing the sun’s twelve-hour passage through the night into the netherworld.

The Amduat (literally "That Which Is In the Afterworld") is an important Ancient Egyptian funerary text of the New Kingdom. Like many funerary texts, it was written on the inside of the tomb for reference by the deceased. Unlike other funerary texts, however, it was reserved only for pharaohs or very favored nobility.