Publisher: Prentice Hall, 1978, 228 pages
C is a general-purpose programming language which features economy of expression, modern control flow and data structures, and a rich set of operators. C is not a "very high level" language, nor a "big" one, and is not specialized to any particular area of application. But its absence of restrictions and its generality make it more convenient and effective for many tasks than supposedly more powerful languages.
Ah, they don't get more classical than this. Extremely hard to read, refuses to repeat any information (i.e., if you haven't read everything in the introduction, you can't do the first exercise in chapter 1).
I have in fact taught C classes based upon this book alone. Even though the pupils at the time didn't appreciate the effort, they still can program in C, 15 years afterward.