"The C Programming Language" is a foundational book written by Brian W. Kernighan and Dennis M. Ritchie, first published in 1978. It serves as a comprehensive guide to the C programming language, which was developed in the early 1970s. The book covers the language's syntax, structure, and features, making it an essential resource for both beginners and experienced programmers. The book is known for its clear explanations and practical examples, helping readers understand how to write efficient and effective C code. It also introduces important programming concepts, such as data types, control structures, and functions, which are applicable to many other programming languages.