The Cellist by Daniel Silva

 This is quite the convoluted tale of the latest exploits of Israeli spymaster Gabriel Allon. It involves Russian money laundering on a grand scale, a dirty German bank, and the January 6th events at the US Capitol. And of course, there's a Cellist. She is a German cellist who went to work for the dirty German bank and couldn't believe what she was seeing. She starts passing documents to an exiled Russian journalist and inadvertently causes the death of an exiled Russian dissident living in London, which is where she catches the eye of Gabriel Allon. As usual, it's quite the page-turner.