Tibetan Book of the Dead-
Or, more correctly, the Bardo Thodol,
Liberation Through Hearing During the Intermediate State
The Bardo Thödol (Tibetan: bardo “liminality”; thödol as “liberation”), Liberation through Hearing in the Intermediate State, is a funerary text that describes, and intends to guide one through, the experiences of the consciousness after death during the interval known as bardo between death and rebirth. It also includes chapters on the signs of death and rituals to undertake when death is closing in or has taken place.
Or, you can read the comic: