This was a very easy category for me to decide as two books immediately came to mind – both have left a lasting impression – their stories poignant and engaging. In no particular order, my favourite non fiction reads/listens of 2018 are:
The Tattooist of Auschwitz by Heather MorrisAnd Evil Has A Name:The Untold Story of the Golden State Killer Investigation by Paul Holes,Jim Clemente,Peter McDonnell
Reading, Writing and Riesling 
The Tattooist of Auschwitz was simply amazing and harrowing all at the same time. I thoroughly enjoyed that book. I hadn’t heard of Evil Has A Name before, going to go check it out.
Jess you will find Evil Has A Name similar in that it is both harrowing and amazing.
I have a couple of Audible credits currently, I might go and download it now.
Great!