What would happen if your estranged grandmother with a vendetta was determined that you help her see it through? Oh, and she's a ghost living in your head. That's the opening premise of Zen Cho's latest novel, Black Water Sister, but as the novel unfolds, it also encompasses Malaysian mythos and religious practices, superstitions, family ties and feminine rage and agency. We speak to Zen about bringing all these strands together. And then in Footnotes, we talk about the book and whether we enjoyed reading it!