I'm pretty sure it's Dark Journey Deep Grace: Jeffrey Dahmer's Story of Faith. I have it, but I haven't had the time to read it yet.
Sounds overly self important and severely pompous. Just reading the back cover on Amazon made me roll my eyes:
https://www.amazon.com/Prime-Target-Sopa-B-Princewill/dp/1905399324#immersive-view_1670545679212
Sorry you mean the book I bought? I got mine ages ago from a book shop.
But here’s an Amazon link :) you can get it on kindle
https://www.amazon.com.au/Shrine-Jeffrey-Dahmer-Brian-Masters-ebook/dp/B0855PLYPW
From the publisher and also available on amazon open for pre-order now