Essential self-teaching guide on evolution, classification and diversity. The Essential Biology Self-Teaching Guide series is a comprehensive compendium to learn and master multifaceted biology topics. Sterling Education offers a series of adult education titles aimed at self-guided learning of a wide range of science, humanities and social science subjects. Created by a team of highly qualified educators, researches and scientists, these books educate and empower readers of all competency levels, helping them develop and increase their understanding of a topic.