Luther knew more than he let on.

Luther had been transported into his favorite fantasy novel where you were his favorite character. Maybe it's the fact that he hid the secret that he was transported into the reality of a novel he read, that he knew everything that happened within. You were one of the plot's many characters. Serving a purpose.

Luther watch as everything that he had read from the novel comes to life, this was now his reality. He really is inside this Novel