I posted this before but probably because it was late at night no one saw. But the novel is about an MC who gets transported to a post-apocalyptic world by some mysterious voice and he has to survive a set amount of time before he gets transported back for a break and has to return and his adventures are turned into an action movie in his world which makes him very famous. Some extra details of the story from where I left off and forgot is that he just acquired a nuclear powered ship/submarine