Since we don't have enough details about this 'day after tomorrow novel', it's impossible to say who the author is. There are so many books out there, and this title or a similar one might be from an indie author or a more well - known writer. We would need more context like the genre, the plot summary, or any other identifying features to figure out the author.
I don't know the specific main characters in this novel since I haven't read it. But they could be ordinary people trying to survive in extraordinary circumstances.
The main character of the movie The Day After Tomorrow was Jack Sully and his family. The story takes place in 2005. Jack and his family are trapped in a refrigerator due to a strong cold wave. In this disaster, Jack became a rescue team member and worked with other rescue personnel to save their families. In addition to Jack and his family, there were many other characters in the movie, such as the female rescue team member Laura (Lala) and her family, neighbors and so on. They all played an important role in the disaster.
The movie The Day After Tomorrow was released in 2004 and was directed by James Hamien. It told the story of a catastrophic event caused by a powerful storm, involving environmental protection, human behavior, natural disasters and many other topics.
Although the movie The Day After Tomorrow and 2012, which was released in 2004, had similar plots, they were not plagiarized. " 2012 " was about a global disaster, while " The Day After Tomorrow " was about a disaster caused by a strong storm to explore the relationship between humans and the environment.
In addition, there were many unique plots and topics in the movie, such as the protagonist Jack Sully's survival and struggle in the disaster, as well as his emotional entanglements with other survivors, which were also one of the highlights of the movie.
Therefore, the movie " The Day After Tomorrow " did not copy another movie. Instead, it used a unique plot and theme to attract the audience like other movies.
The movie 2012 was not a sequel to The Day After Tomorrow. 2012 was a disaster movie directed by James Cameron. It told the story of the Earth facing extinction in 2012 and humans had to take action to save the Earth. Although some people thought that it was similar to the story of The Day After Tomorrow, the two were not directly related.
The main characters of the movie The Day After Tomorrow included:
1. Jack Gyllenhaal as Sam Hall
Dennis Quaid as Jack Hadson
Amy Rossum as Denis Quaid's wife, Alison Rossum
Sam Hadassen and Jack Hadassen were a pair of lovers. They were trapped in Golmud in a blizzard. In order to escape the cold and death, they decided to find a way out together. Denis Quaid's wife, Ellie, also played an important role in the journey. She faced various difficulties and challenges with Sam and Jack.
Yesterday, today, tomorrow, and the day after tomorrow were translated into classical Chinese as follows:
Yesterday, today, tomorrow, and the day after tomorrow.
Well, without more context, it's hard to say precisely. But if it's a science - fiction 'day after tomorrow novel', it could deal with things like climate change and its extreme consequences in the very near future. It might follow characters as they struggle to survive in a world that has suddenly and drastically changed. For example, there could be rising sea levels, extreme weather conditions, and a breakdown of society as a result of these environmental upheavals.