Working on it. Really solid sources are a bit sparse, though. It's one of those odd cases, which I think are both problematic but interesting for Wikipedia: someone who is clearly notable, but proper bios on him don't really exist, just scattered mentions that need to be tied together. It's a lot easier to write bios on people who already have other bios written on them (since that solves the problem of what to cite pretty easily).
The fact that he has books with his name on it should help.