This is an interview from 2010 and covers Crumb's illustration of the Book of Genesis. I don't own Crumb's book but have seen it reviewed (RIP Ed Piskor) and it looked wonderful. I can't read the article unfortunately due to the paywall (and the "archive" links don't work for me in general anymore) but I am also reminded that his wife Aline died in late 2022, so I hope Crumb's doing OK.