I'm just thinking of some plot twists in my head, about the novel he has read in his past ...

I'm just thinking of some plot twists in my head, about the novel he has read in his past life. Wasn't it his bestfriend who recommended it to him? What is he's the onw who wrote it and he has the memory of the ml? IDK we need a explanation about that book!! AND HIS BESTFRIEND BRO. LIKE TAKE THE ROSK OR LOSE THE CHANCE