This book an enjoyable ride and a nice quick audiobook read. I found the lead detective Hulda's backstory and career interesting, and I enjoyed watching her solve a crime and take a crooked detective and misogynistic police department down a peg or two in the process. The relationships between the 5 'friends' (and their family members) that stretched across the dual timelines were sufficiently interesting to keep me engaged, and I didn't work out who the killer(s) were until the very end, which I always enjoy. The setting in Iceland was very vividly described and added to the enjoyment of this book for me - in fact I've already started another in this series hoping to find the same thing.