Books like The expression of emotions in man and animals by Charles Darwin

Richard Dawkins’ classic, The Selfish Gene reexamines evolution from the perspective of genes as primary agents, arguing that organisms serve as vehicles for gene replication.

Charles Darwin’s *The Descent of Man* extends his theory of natural selection to human evolution, arguing that language, morality and other human traits arise from the same biological processes that shape the natural world.

For over two thousand years, unicorns have inspired, enchanted, and eluded humanity. The beast appears in Old Testament texts and Greek and Roman natural histories; Christians adopted it as a symbol of Christ, the Middle Ages as a symbol of courtly love. There was a brisk trade in unicorn parts in medieval and Renaissance times, and travelers regularly reported sightings into the modern era. But by the early twentieth century the real-life contenders for the beast had been ruled out, and scientists concluded that the unicorn never existed. It turns out they were a little hasty. Where did the unicorn come from, and how was it accepted as a part of the animal kingdom for so long? Chris Lavers argues that although the unicorn of our imagination isn't real, traces of its character can be found in existing species. In this lively and vivid exploration of the natural world, Lavers follows the beast's trail to the plateaus of India and into the jungles of Africa to unearth the flesh and blood ancestors of our iconic unicorn. Along the way, Lavers introduces the peoples, historians, explorers, traders, and scientists who believed in the unicorn, and describes their efforts to pin it down. Its changing status-from one-horned ass to religious symbol to pure myth-reflects man's journey from superstition to scientific understanding, ultimately leading to a greater insight into the natural world.

Based on Marc Bekoff’s years of research on animal social communication, this nonfiction work reveals that non‑human animals experience a broad range of emotions—joy, empathy, grief, embarrassment, anger, love—and urges readers to rethink how we view and treat them.