After having read volumes I & II, I felt compelled to read volume III in spite of other customer reviews here. Having just finished this one, I'm inclined to agree with the other reviewers - interesting, but not as earth-shattering as the first two. The first half of the book covers, in volume-II style detail, an implementation of T/TCP for BSD; although this is interesting, it's not very practical, since T/TCP never caught on in the real world. The next part of the book covers HTTP & NNTP, but doesn't go into much detail; if you know what HTTP & NTTP are, you probably already know all the material covered in this book. Finally, the book ends by examining the BSD implementation of the Unix domain sockets. This last bit was the most relevant part of the book, but don't even think about trying to read this if you haven't completed volume II (and have it handy - the text refers back to specific pages and diagrams from Volume II). If you've read the other two books (Volume II in particular), you'll want to read this one to round out the experience, but don't expect to be blown away like you were with the others.

After having read volumes I & II, I felt compelled to read volume III in spite of other customer reviews here. Having just finished this one, I'm inclined to agree with the other reviewers - interesting, but not as earth-shattering as the first two. The first half of the book covers, in volume-II style detail, an implementation of T/TCP for BSD; although this is interesting, it's not very practical, since T/TCP never caught on in the real world. The next part of the book covers HTTP & NNTP, but doesn't go into much detail; if you know what HTTP & NTTP are, you probably already know all the material covered in this book. Finally, the book ends by examining the BSD implementation of the Unix domain sockets. This last bit was the most relevant part of the book, but don't even think about trying to read this if you haven't completed volume II (and have it handy - the text refers back to specific pages and diagrams from Volume II). If you've read the other two books (Volume II in particular), you'll want to read this one to round out the experience, but don't expect to be blown away like you were with the others.