In the third edition of the book C in depth , the authors explain the basics of the programming language while maintaining the integrity and clarity of the programs. The book can be utilized by both beginners and advanced level programmers as a self-evaluation and learning source. There are more than 310 programs with explanations to illustrate the concepts of programming and over 450 exercises to challenge the readers in programming. These exercises are accompanied by solutions and hints where deemed necessary. The book begins with an introduction to the language and explains the elements, input and output, and operator and expressions used in programming. Control statements, functions, arrays, pointers, strings and files are covered next in successive chapters. Every chapter has examples in the form of programming that are explained step-wise. Five chapters have been added in the third edition, which includes chapters on Recursion and Bitwise Manipulation. Chapters on project development and library creation, code optimization, assembly interactions, and operations on bits may be helpful for further execution of the knowledge of programming.