What techniques did the author use?

The narrative of A Monster Calls is related from a third-person, limited point of view, although always focused on Conor's perspective. It is not broad view of everything happening. This is a good choice because this story wholly belongs to Conor. Every important event happens inside his own heart and mind, and through his dreams, however, a few key scenes need to be described from outside his view.

The author also uses objects..... hence, the clocks, which signal time running out..... the yew tree that symbolizes healing.