Honestly, wasn’t sure what to expect, and it’s not like I was disappointed. It’s just a really hard book to rate because it’s also a hard one to read, really. The book of the dead is a guide to prepare one after death, with the aim of ending cyclical life. What this translates to in reality is a bunch of prayers and mantras, quite repetitive at times, that you’re supposed to repeat over and over as you meditate. 
It’s very interesting to learn, or at least get a glimpse of, how buddhist rituals take place, especially the prayers after one has died, as well as to the pantheon and the conception of the afterlife and regeneration. It’s so cool that monks in Tibet, for centuries, live life preparing for an out of body experience, rejecting all forms of attachment this way. And this is such an ancient text too! Very impressive and fascinating. Just not the smoothest read.