This book contains a lot of most recent results on general solution and various stabilities of several different types of rational functional equations. This work will constitute the basis for the learners of the theory of functional equations and their applications in different other fields. The results available in this book will motivate the researchers in this field to extend the results. The results are presented in a lucid and comprehensible manner. The notions and ideas offered in this book will be delectable to the readers. This book will be helpful for Under Graduate, Post Graduate and research students. There are only few books and monographs available on the topic of Functional Equations and Functional Inequalities. So this book will be a gesture to facilitate the needs of the students.