The Bucharest Ledger. Marcus Vane Series, #2

For readers of John le Carré, Alan Furst, and Mick Herron. The backdoor had an architect. And the architect left a ledger. One betrayal has been exposed - but Marcus Vane knows every operation has a beginning, and this one's roots run east. From the archives of a service that no longer exists to a name that keeps surfacing in Bucharest, he follows a paper trail older than the Cold War's end, kept by someone who recorded everything and was never meant to be read.
The deeper Marcus reads, the clearer it becomes: what looked like one man's treason is only the visible edge of an operation that has been running - patiently, profitably - for decades, and the people who built it are still keeping the books. The Bucharest Ledger is a slow-burn, morally complex espionage novel of institutions, memory, and the long half-life of betrayal. Book Two of the Marcus Vane series.