Start with high-confidence death & dying books, then narrow by subgenre or adjacent topics.
Life After Life
Raymond Moody, Raymond A. Moody Jr.
The Lost Art of Dying
L.S. Dugdale, Lydia S. Dugdale
Briefly Perfectly Human
Alua Arthur
Bye Bye I Love You
Michael Erard
From Here to Eternity
Caitlin Doughty, Recorded Books
Stiff
Mary Roach
Dying
Pat McNees
Memento Mori
Joanna Ebenstein
Somebody Is Walking on Your Grave
Mariana Enriquez, Megan McDowell
Being Mortal
Atul Gawande
All the Living and the Dead
Hayley Campbell, Macmillan Audio
Over My Dead Body
Greg Melville
On Grief and Grieving
Elisabeth Kübler-Ross, David Kessler
A Beginner's Guide to the End
Dr. BJ Miller, Shoshana Berger
Finding Meaning
David Kessler
Bearing the Unbearable
Dr. Joanne Cacciatore, Jeffrey Rubin
Understanding Your Grief
Alan Wolfelt, Alan D. Wolfelt
Walking Each Other Home
Mirabai Bush, Ram Dass
Reading Six Feet Under
Kim Akass, Janet McCabe
The After-death Room
Michael McColly
Mexico's Day of the Dead
Luisa Navarro