The novel's central focus is the evolving nature of love when confronted with drastic change. Lewis's transformation into a shark isn't just a physical change; it's a metaphor for the myriad ways love can shift, adapt, and endure even when tested by the unimaginable.

The book probes the essence of what makes us human, challenging readers to confront their own perceptions of identity and what truly defines a person, looking beyond physical form to recognize humanity in unexpected forms.

The novel explores how individuals cope with grief and learn to navigate a world forever altered by absence, suggesting that acceptance, while painful, can ultimately lead to a deeper understanding of life, love, and the power of letting go.