If you didn't grab the second omnibus of titles in the Dead End Job series by Elaine Viets when it was free a while back, or if you just prefer individual titles, not in a big volume, here is the eighth title,
Killer Cuts, for free at Kindle US and UK.
Kindle US:
https://www.amazon.com/dp/B079TDX3GP
Kindle US/Smile:
https://smile.amazon.com/dp/B079TDX3GP
Kindle UK:
https://www.amazon.co.uk/dp/B079TDX3GP
Kindle UK/Smile:
https://smile.amazon.co.uk/dp/B079TDX3GP