Most Complete Michael J. Seidlinger Collection Ever?

So, do I have the most complete Michael J. Seidlinger collection ever?

A number of these are out of print right now and hard to find. The Artist in Question is almost impossible to obtain (someone might have most of the others, some may even have The Artist in Question, but I’m not sure anyone, even Michael, has The Artist in Question and all these others). However, I think I’ve got every full book he’s written. Anyone see anything I’m missing?