These days I am reading "Moonlight Becomes You" by Mary Higgins Clark. In the author's note, she has mentioned a couple of books about funeral customs as well as practices that she read and found fascinating. No doubt this is quite a morbid subject, I might take a  look at them one day. Here they are for future reference:

Consolatory Rhetoric - by Donovan J. Octs
Down To Earth - by Marian Barnes
Celebrations Of Death - by Metcalf Huntington