It's difficult to be certain. He might be fortunate because he has a strong support network of friends and family. He could also be considered fortunate if he has a talent or skill that has brought him many opportunities in life. Maybe he has a great deal of inner peace and contentment, which in itself is a form of fortune, and he is sharing his story to show how he got to this state of being.
Well, 'A Fortunate Man' can be considered a true story to a large extent. It incorporates real-life situations and emotions, although it might have been adapted and fictionalized to some degree to make it more engaging for the audience.
Since I haven't read the 'fortunate man novel', it's difficult to say exactly. However, in many novels with a title like this, the main character is the 'fortunate man' himself. He could be surrounded by other important characters such as his family members who either support or oppose his fortunate circumstances. There may also be a rival or an antagonist who tries to disrupt his good fortune, perhaps out of envy or a different agenda.
The main theme could be about the idea of fortune or luck in a man's life. It might explore how the character experiences fortunate events and how these shape his identity and journey.
It might be centered around how the man in the novel overcomes challenges with the help of his good fortune. Maybe he has some lucky breaks that lead him to success and self - discovery. For example, he could encounter people who help him at crucial moments, or he might be in the right place at the right time for certain opportunities.