An omnibus of the first three Berlin Noir books by Philip Kerr is on sale for $1.99/£0.99 in the US/UK respectively. This series features Bernie Gunther as a German PI in Nazi Germany (and later), and several of the books in the series have been nominated for various awards. I’ve read and liked many of the books in the series too. The three titles in the omnibus are: March Violets, The Pale Criminal, and A German Requiem. Kindle US | Kobo US | Kindle UK
Again on sale at Kindle UK for £0.99. The link in the OP is still good. NOT on sale this time, at least as of now, in the US.
And again on sale in the UK only…
Prussian Blue is the 12th in the Bernie Gunther series by Philip Kerr. It has dropped to £0.99 at Kindle UK right now:
https://www.amazon.co.uk/dp/B01INGSYQO
Metropolis is the 14th and last (since Kerr passed away in 2018) in the Bernie Gunther series. Although last published, it is, however, per SYKM, a prequel. It has dropped to $1.99 in the US right now.
Kindle US: https://www.amazon.com/dp/B07FS7B6P2
Kobo US: https://www.kobo.com/us/en/ebook/metropolis-52
If the Dead Rise Not is the 6th in the Bernie Gunther series. It has dropped to £0.99 at Kindle UK: link: https://www.amazon.co.uk/dp/B002WIG3PE
Field Grey is the seventh in the series. It has dropped to £0.99 at Kindle UK: https://www.amazon.co.uk/dp/B004OR10J0
Greeks Bearing Gifts is the next-to-last in the Bernie Gunther series, at least by publication order, but it’s the last chronologically because Metropolis is a prequel. (At least per SYKM – I haven’t read Metropolis yet…) Greeks has dropped to £0.99 at Kindle UK right now.
Kindle UK: https://www.amazon.co.uk/dp/B072L23VRT
The One From The Other is the fourth in the Bernie Gunther series by Philip Kerr. It has dropped to £0.99 at Kindle UK:
https://www.amazon.co.uk/dp/B0038QN2A8
Prague Fatale is the eighth Bernie Gunther book. It’s £0.99 at Kindle UK right now: https://www.amazon.co.uk/dp/B005W0ARFQ
The omnibus of the first three books in the series is £0.99 again at Kindle US. The link in the OP is still good.
If the Dead Rise Not is £0.99 again at Kindle UK: link: https://www.amazon.co.uk/dp/B002WIG3PE