Home Page Replica is/was one of the earliest collections of material about Captain Beefheart and the Magic Band on the web.
Recently:
John "Drumbo" French has a new book out:
Beefheart: Through the Eyes of Magic.
The website has excerpts, and it's available on Amazon and on Ebay, signed. Look at the first review on Amazon...
Less recently:
I stumbled into a collection of my old news postings; it's missing a recent chunk, but it's still fine to browse.