I've finally read them all, including the recent book "The Hallmarked Man", could hardly put them down once I started on them in January.
A few observations.
It's very clever the way she binds a detective story that appeals more to men with the emotional roller coaster of Strike & Robin's relationship (and other more peripheral characters) which is more appealing to women, this captures 2 audiences in a way that a James Bond book or a Danielle Steel romance could. If truth be told I'm beginning to find the emotional bits becoming a little over done.
The stories are all set against the backdrop of real UK news events and in real UK locations described very accurately if you know them yourself.
Isn't it shocking that the main characters lie to each other so much.

JK is a damn sight better than Agatha Christie at misdirection but the final reveal sort of follows Christie's pattern.
JK uses such an extensive vocabulary that I sometimes had to look up some of the words she used!
For the last book I took to making a few notes on the suspects & witnesses that appeared in the books there are so many!
I've discovered there is a Strike fandom site which even has GPS data on the locations that appear in the book.
I'd better find something else to read now.