Egyptian Underworld Texts
According to this guide to the various underworld texts, The Book of the Dead isn't the main text for going into the Afterlife. It is the most popular, however, and it's the only that actually gets a *commoner* into "heaven", as opposed to heaven being a pharoah-only club. Since none of our characters are pharoahs (except for maybe the sons of Elrond, and even that's a stretch)... I guess we're stuck using that.
Book of Heavens/Earth - stuff about the gods. Not neccessary for my use.
Book of Caverns - apparently for the underworld journey of the king. I can excuse not using it by saying the commoners' path (by the Book of the Dead) being a different path than the path of the pharoah.
Book of Gates - doesn't say who this is for. I'm guessing it mainly focuses on obstacles into the underworld. I guess I'll need to at least familiarize myself with this version as well.
Amduat - the path of the sun god. Nothing much to do with the rest of us.
Pyramid Text/Coffin Text - collections of spells, basically. They're mostly merged into the Book of the Dead anyhow. So no worries there.