Babylon Berlin by Volker Kutscher is published by Macmillan in the US, but by Joffe in the UK, where it is free right now. And given the Macmillan thing, I wouldn’t expect it to go free in the US anytime soon 😊. So if you live in the UK, or can travel, you may want to pick it up there right now…
I’ve had my eye on this series for a while, so will be glad to give it a try.
Buy at Kindle UK