The purpose of this Encyclopaedia is to provide a traditional treatment of Ordinary Differential Equations. This Encyclopaedia of Ordinary Differential Equation is well written and easy to follow chapters on many different areas. The layout and style are cleverly designed to keep students working through the chapters. As a reminder of useful techniques, these volumes are definitely valuable. The scope of this encyclopaedia is limited to Linear Differential Equations of the First Order, Linear Differential Equation of Higher Order, Differential Equations of higher degree and special methods of solution of Differential Equations of Second Order, keeping in view the requirement of undergraduate students. This encyclopaedia is designed to cover the basics thoroughly and then move on. Each page of these volumes is packed with direction, examples, and a world of understanding. This book is an excellent support and resource for the teacher. This is an outstanding resource for anyone interested on knowing more about the art of teaching.