The quote from William Shakespeare, "So shalt thou feed on Death, that feeds on men, And Death once dead, there's no more dying then," captures the eternal cycle of life and death. In the context of J.D. Robb's "The In Death Collection: Books 16-20," it reflects themes of mortality and the impact of death on human existence. It suggests that once one confronts and overcomes death, the fear associated with it dissipates, leading to a kind of liberation.

This philosophical perspective resonates throughout Robb's series, where the characters often grapple with the implications of death in a world filled with crime and moral complexities. The exploration of life, consequences, and the nature of death enriches the narrative, providing depth to the characters' journeys as they seek justice and understanding in a life overshadowed by violence and loss.