I feel like there's a chapter missing, in the novel there a seen when that hyena made a de...

I feel like there's a chapter missing, in the novel there a seen when that hyena made a deal with heart of the chaos/nightmare, as the new tower master, in exchange for power they are plague with nightmares, that why iona really value the that can ward of the nightmare, and that hyena was supposed to be on verge of going insane because a lost of sleep that he thought that iona was just an illusion