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Title: Excellent - but only for SCO. Often refers to the man pages.
Review: This is one of the few books that explores Unix kernel internals. Unfortunately, it is highly specific to the SCO version of Unix. The book constantly refers the reader to the system man pages for more information. Doesn't touch modern topics such as threads and multiprocessors. It also full of examples; but they use SCO specific examples and make extensive use of SCO utilities. And, many examples require root to actually run; otherwise you're limited to reading the excellent screen captures.If you do system programming for SCO, this is a must have (along with SCO's system documentation). If you're into many Unix(s) (Solaris, Linux, BSD, AIX, etc.) you'll be disappointed. I work with Solaris, BSD and Linux and am trying to decide to keep it for reference or return it.
