What is the narrator point of view in the novel, How to Be Eaten?

The point of view of the novel varies throughout. At first, it seems as if the novel is going to be written in a simple omniscient narration with a third-person present narrator who skips around inside the heads of all five women attending therapy in the YMCA. However, in the chapters entitled with the names of specific characters, those characters narrate their own stories in first-person past.