Daniel Ambler is an author.
More importantly and specifically, he is a spy novelist and apparently successful enough that he is famous enough to be asked to speak at important functions. Amusingly, as we meet him in the first recorded adventure, he tells a friend about a recent speaking engagement at a university cancelled because a few pro-Palestinian students objected to a Jewish author being allowed to give a talk at their school - the amusing part coming from the fact that their labeling him as Jewish came from his first name totally ignoring the fact that he is a lapsed Catholic. Ambler might be annoyed at such mistakes but he is neither angered nor surprised by them. He reminds his friend that Lenin once referred to college professors and their students as "useful idiots".
... more to come