Tiny Pregnant Woman is a secondary character who goes unnamed until Wren reads her obituary toward the end of the book. Analyze Tiny Pregnant Woman’s relationship with Wren; what is the effect of her namelessness?

Both Lewis and Angela mutate into dangerous apex predators who pose a physical threat to Wren as she cares for them. Of all the animals, why do you think Habeck chose predatory ones for her characters to become? What is the significance of the physical dangers they present for Wren?

Consider the title of the book. What is the “shark heart,” exactly, and who has it?