I can offer some suggestions, tho indirect and roundabout. The fact of death ends us, but the idea/concept of death saves us. Death is deeply addressed in: Irv Yalom’s Existential Psychotherapy, and if you’re an ambitious researcher, Rollo May’s Existential Psychology, which contains excerpts from the philosophical roots of this approach. More practical are Yalom’s Staring Into The Sun:Overcoming The Terror of Death, and Who Dies by Steven & Andrea Levine.
At last report, Yalom, one of the great luminaries of psychotherapy, is in his 80s, still writing and seeing a few patients for single session therapy consults. His revised and updated Theory & Practice of Group Psychotherapy is in it’s 5th edition, quite rare in my field. Because interpersonal processes importantly influence any approach to group therapy, no professional can competently lead a therapy group without reading this seminal book.
My decades ago dinner with him and his wife was far more influential on my developing therapeutic/group therapeutic style then I’d realized at the time.
I meant to & forgot to include Oliver Saks’ last 4 very short essays collected as”Gratitude”, written as he was finishing dying – profoundly simple and deeply touching.