Plans are very complete, taking you through the build process step by step. Material lists and sources are also very complete, and often include kit sources for assemblies that require machined components, such as the headstock and tailstock spindles for the lathe. That was back in the 80's so it is doubtful these sources are still available, but alternatives can be found, such as replacement parts for conventional machines, or you can always make your own if you have the means.
The book can be found in the used market, where I found this, like new copy. Failing that, all the plans were published in Wood magazine as mentioned above, back in the 80's. I mentioned the lathe to a person on a forum and the issue it was in, a while back. He quickly found the copy (if it was a paper copy, he didn't mention it) on line, so they are out there.
If I am feeling ambitious and my site is still up, I will scan and share the book towards the end of the year.