If you don't wanna pay, Library Genesis has the first edition (2004), but, if you didn't find the examples to be at least modestly interesting in themselves, is this even your bag? As a Linux sysadmin and occasional writer of lousy C programs, I often consult NetBSD's source tree for when I want good examples that aren't as complex as GNU's, so I expect to come back to these.
Judging by the publisher's sample,[1] the second edition (2025) looked like a worthwhile upgrade, so I ordered it. Much of the material is in the manpages, but this presents it with better explanations.
