Is everyone here familiar with
The Paris Review Writers' Interview series? The interviewers and subjects are both writers, and the interviews themselves usually involve discussions of methods, process, output, editing, and other matters of interest to aspiring and seasoned language wranglers. Fiction writers are most prevalent, but poets, nonfiction writers, essayists and "humorists" (though S.J. Perelman prefers
humorous writers) are included.
The interviews were first published in the magazine and then used to be collected and sold in volumes (my family owned the first four and I grew up reading and sometimes memorizing them).
Now, of course, many of those same interviews and several newer ones are available for free on line:
http://www.theparisreview.org/interviews
If you don't know this series, I urge you to visit this archive. If you knew it already, then you also know why I'm recommending it.
If some of your favorite writers from the past sixty years aren't represented, I'll be amazed.