A well explained and excellently illustrated guide to the evolution of agriculture across the planet. Leonard's analyses of the steps needed to domesticate wheat, corn, goats or dogs are detailed, clear, and insightful. Of course a lot of information has been added since this book came out, especially concerning Old Europe and China.
Although this book is probably somewhat out of date (1973), it is easy to read and beautifully put together. The information is clearly based on specific archaeological studies, which gives the book another level of interest.