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In order...
1)Yes, spell the numbers at the beginning of the names and use a custom title for display as digits.
2)If, as your questions makes it seem, there is no actual verifiable data on Powers beyond the existence of the name, I wouldn't bother making one. Or, just keep it very basic "This person wrote the following, and frequently makes use of these tropes" with no real biographical info.
3)Seek out Trope Finder for answers regarding "Teh Evil Moslems" and the oblivious nerdling.
4)Try asking in relevant forum threads if any exist to see if there are other fans who might be willing to help.
Been trying to fill in the works of two prolific writers, Ira Tabankin and P. S. Powers, both of which I know purely through Amazon, and I have a couple questions. At least three Tabankin titles start with numbers, is it acceptable to write them out and custom title the digits? Is it alright to make a creator page for Powers even though it's probably a penname and every "about the author" he writes consists of trolling? Do we have an "Teh Evil Moslems" trope besides Mideast Terrorists? Because it comes up a lot in Tabanlins books. Likewise Powers is incredibly fond of a specific protagonist, a hilariously humble yet skilled nerd who is incredibly shy around women, to the point of outright refusing to believe they want anything to do with him, who amasses an enormous fame and wealth without really noticing. Is there a way to ask for help with these besides adding them to the vast list of 'needs wiki magic love' and praying for a miracle?