Everything you need to understand or teach Funeral in Berlin by Len Deighton.
A principal theme in Funeral in Berlin stems from the very practice of intelligence work — namely, the question: "Whom can you trust?" This theme was introduced by Deighton in The Ipcress File, and he supported it in his Appendix to that novel by quoting some lines from Shakespeare's Julius Caesar. In this drama, Artemidorus reads aloud a note he wrote to Caesar warning him to beware of his colleagues: "Caesar, beware of...