I'm not certain as there are many novels that could potentially be called 'the mad man novel'. Without more specific information, it's impossible to say who the author is.
I'm not sure specifically which 'the mad man novel' you are referring to. There could be many novels with this name or a similar title. It might be about a character who is considered mad and perhaps his experiences, his inner thoughts, or the events that led him to be seen as mad.
One unique feature could be its art style. The graphic novel might have a distinct visual look, with detailed illustrations that bring the story to life. Another could be its narrative. It may tell a complex story that's engaging and thought - provoking. Also, the characters in'mad man graphic novel' could be very well - developed, with their own personalities and backstories that draw readers in.
There's no way to know precisely without having read the'mad man graphic novel'. But in general, the main characters could be characters with strong personalities. Maybe there's a hero - type character with a moral code they are trying to uphold. There could also be a group of friends or comrades who are all involved in the main plot together. Or perhaps there's a solitary figure who is the key to unlocking the secrets of the story's world.
This novel may use the diary format to give a very personal and unfiltered view of the old man's life. The 'mad' aspect could be due to various factors such as unfulfilled desires, loneliness, or a sense of being left behind by society. It might also show his relationship with his family, friends, or neighbors in a unique light.
One possible theme could be the passage of time and the inevitability of aging. The old man's madness might be related to his struggle to come to terms with his own mortality.
One historical mad man story is about Caligula. He was a Roman emperor. He had extremely erratic and cruel behavior. He once made his horse a consul. He was known for his excessive spending, sexual perversions, and random executions. His actions were so extreme that they led to his assassination.
I'm not a novel reader, and I don't have the ability to search and recommend novels. However, if you have any specific questions about the novel, I'm happy to provide you with help and advice. Please tell me what kind of information you need and I will try my best to answer your questions.