The authors believed C was not a "big" language and shouldn't be served by a big book.
Some GitHub users host "K&R 2nd Edition" PDFs but label them incorrectly or include personal notes/solutions for modern compilers. Recommended Modern Alternatives The C Programming Language 3rd Edition Pdf Github
To clarify, there is no official of the legendary book The C Programming Language by Brian Kernighan and Dennis Ritchie (often called "K&R"). The 2nd edition, published in 1988 to reflect the ANSI C standard, remains the final version written by the original authors. The authors believed C was not a "big"