This book covers the topic in Oscillation Theory of Second and Third Order Neutral Type Differential Equations with Mixed Arguments and is written by authors who are in this field for the past three decades. It contains several results regarding the oscillation of different types of second and third order neutral differential equations with mixed arguments reported in the literature for the last 10 years. Sufficient number of examples are provided in each chapter to illustrate the main theorems. Its step by step expositions are easy to the readers to understand the results and examples on the oscillation theory of neutral type differential equations with mixed arguments.