Joseph Story was probably a figure with various aspects to his identity. Maybe he was a professional in a certain field, like a writer, a scholar, or a public figure. His life and letters would then be a way to explore his achievements, his setbacks, and his influence on those around him. From the title, we can assume that the book or work aims to document his life journey through his own written correspondence and other related information.
There's not enough information to define exactly who he is. He could be a person from any walk of life. He might be a war veteran with tales of heroism and sacrifice. Or perhaps he's a teacher who has influenced generations and is now sharing his life experiences, including his methods of teaching and how he connected with his students.
Whether the story of Joseph is true is a complex question. It could be seen as true in a moral or spiritual sense, teaching valuable lessons, even if some of the details might be open to interpretation or might not be verifiable in a conventional way.
The JoJo manga is mainly in black and white. Colored versions exist but are not the norm. Sometimes, colored illustrations are done for promotional purposes or by fans.
I think it's great. The characters are memorable, the plot is full of twists and turns, and the battles are epic. It's a manga that stands out from the crowd.