248 pages of interviews with Moebius, Dr. Moebius and Mister Gir. Translated into English. Sadly, though, we’re going to have to wait until next springtime to get it.

I can imagine a 600-page Dream Quest of Unknown Kadath adaptation by Moebius, but it was never to be.

Starlog magazine: Issue 112 had an interview with him, buried in a Star Trek issue. But it appears to be the only one on Archive.org.