In "Life Changing", Helen Pilcher is providing the reader with a broad survey and numerous examples of how humans are altering life on earth - specifically focusing on the deliberate and accidental human impact on the genetics and evolution of the flora and fauna around us. Pilcher takes a look at the species that we have deliberately engineered for a specific purpose, such as dogs, domestic animals, spider-goats, GM mosquitos, day-glow tropical fish, and AquaAdvantage salmon. She discusses the wide variety of methods used for fiddling with a species genetic makeup, including selective breeding the old-fashioned way, cross-breeding, as well as various biotechnological methods to produce specific results. This is a fairly balanced book that covers a variety of diverse (and often contentious) topics such as domestication, cloning, urban evolution, transgenic species, invasive species, de-extinction, rewilding, and conservation. The examples cited are fascinating, with a decent number that I haven't come across before (e.g the Kakapo conservation/breeding efforts and the coral breeding efforts). Pilcher has an easy-going writing style that doesn't bog the reader down with too much irrelevant material or information that is too technical. The book is a bit light on the more technical aspects of the science involved, but in terms of a popular science book, this is one of the more interesting and well written ones that provides food for thought.