How does the life cycle of a sperm whale reflect the complex biological and environmental realities of the deep ocean? Victor B. Scheffer, a biologist with extensive experience in marine mammal research, utilizes a blend of scientific observation and narrative prose to document the life of a single sperm whale over the course of one year. The book argues for a deeper understanding of marine ecosystems by humanizing the biological processes of one of the ocean's most elusive creatures.

Experts and naturalists frequently cite this work as a classic example of accessible science writing that maintains biological accuracy. Readers often note the lyrical quality of the prose, which balances technical detail with a clear appreciation for the marine environment.