"Gilders weaves a spellbinding account of her voyages through the Sea of Cortez and the Pacific Ocean in search of whales.... [Her] encounters with whales occasion reflections on such matters as speciation and evolution, the diversity of life, the role of politics and science in the treatment of animal populations, and the ethical and moral dilemmas that face us as we contemplate the sentience of nonhuman animals." (From the back cover.)