After programming already for many years, the book "C: Interfaces and Implementations" by Hanson still showed me some new tricks for writing libraries in a more

After programming already for many years, the book "C: Interfaces and Implementations" by Hanson still showed me some new tricks for writing libraries in a more bullet-proof way, and I have mentioned or used it in every C course I have taught ever since. The book contains some production-quality data type implementations that aspiring C programmers ought to read.