I haven't been able to find any definitive information indicating that 'Shock Wave' is Dirk Pitts' last novel. It could be that he has written more since then, or perhaps he is planning on writing more in the future. To be certain, one would need to research recent publications by him or statements from his publisher.
Douglass in this story is likely a character who has a significant role in the narrator's life. He might be someone with a particular background, like coming from a different place or having a unique profession. Maybe he is an artist, a philosopher or just an ordinary person with extraordinary stories to tell. The story will probably unfold more about his identity as it progresses.
Helen was the daughter of Zeus and Leda, the third generation of the gods in ancient Greek mythology. She was the adopted daughter of King Tindareus of Sparta. When she was born, she was given the ability to imitate the voice of any woman. Helen was considered the most beautiful woman in the world, and her beauty triggered the Troy War. She eloped with Prince Paris of Troy and became Helen of Troy.
Helen included Helen Ma, Helen Mirren, Helen McLowry, Helen Hunt, and Helen Keller. Helen Ma was an actress from China Hong Kong. She had participated in many Shao's films and TV series. Helen Mirren was a British actress who had won many awards for her films and TV series. Helen McLowry was a British actress who had acted in movies and television dramas. She had received Primetime Emmy Awards and the British Empire's Knight Commander's Medal. Helen Hunt was an American actress, director, screenwriter, and producer. She had won Emmy and Academy Awards for her television series and movies. Helen Keller was a legendary figure of the 20th century, known as the creator of miracles.
I'm not sure who the specific author of 'Douglass science fiction' is. There could be many relatively unknown or emerging authors with works in this genre.
One important aspect of Frederick Douglass' short story is his unique narrative voice. He writes from his own experiences as a former slave. This gives authenticity to his stories. In his short stories, he also challenges the common misconceptions about slaves at that time. He shows that slaves were intelligent, capable of emotions, and had a strong will to be free.