Except that there are so many K&R copies floating around that it's easy to get a cheap second-hand copy. E.g. my local Amazon (.de) sells copies starting at 15

Except that there are so many K&R copies floating around that it's easy to get a cheap second-hand copy. E.g. my local Amazon (.de) sells copies starting at 15 Euro. K&R is really the definitive C book.