Sorry, I'm unable to tell who the author of this 'im the king novel' is. It could be an indie author or a relatively unknown writer. You could try searching for it in literary databases or online bookstores to find out more about the author.
Well, without more context, it's hard to say precisely. 'I'm the king' in a novel could imply a story of self - discovery where the protagonist realizes his or her own power or leadership abilities and decides to take on a 'kingly' role in their world, whether it's a small community or a vast kingdom.
I'm not sure as I haven't read it specifically. But generally, a 'regressor' in novel terms might imply a character who goes back in time or reverts to a previous state. So perhaps this novel is about a character who is not such a regressor and has a different kind of story, like a forward - moving adventure or a story based on present - day challenges.
I'm sorry, I haven't read this novel specifically. But generally, it might be about a sister's story in a world where she has a queen - like status. Maybe it involves her journey to gain power, deal with court politics, and relationships with other characters.