Berlin Game is the first in the Bernard Samson series by Len Deighton. A Penguin Modern Classics (!) version of Berlin Game is on sale for £0.99 at Kindle UK today, as part of today’s Daily Deal. Per SYKM, this was a finalist for the 1983 Gold Dagger Award.
Buy at Kindle UK
Spy Hook is the fourth Bernard Samson book. It’s £1.99 at Kindle UK right now: https://www.amazon.co.uk/dp/B08QV6X442
Charity is the ninth and final Samson book. It’s £0.99 right now at Kindle UK: https://www.amazon.co.uk/dp/B08QV76WHW