There looks to be
a PDF of some Marduk rites by Mike Cecchetelli on here. I’m a big fan of Cecchetelli’s Book of Abrasax, haven’t tried any of the Marduk material but it might be up your alley.
As for the Simon Necronomicon, yeah it’s good working magic. There is something about it for sure. It practically inspired the Gate Walking trend that’s so common today. I doubt even half of the people working Rufus Opus’ system have any clue that the idea of walking the gates in order came from Simon and not Trithemius lmao. Seriously some powerful stuff in there, and it’s very popular in the Armed Forces funny enough. Simon/Peter got a little sketched when so many Air Force guys were writing him expressing their interest in it.
The Simon Necronomicon certainly doesn’t deserve the ridiculous slander that Dan Harms & John Gonce put on it in The Necronomicon Files. These guys made up a whole story about how the book was made intentionally defective, was never meant to be sold, and then stolen by Herman Slater and published under everyone’s nose. Which of course ignores the fact that Simon & crew had many people from OTO consulting on it, that they had a party in anticipation of the release date, etc.
That said, you can’t entirely believe Simon’s story of its origins either. Check out Dead Names if you’re curious, but keep in mind that Simon said himself in an interview on ThelemaNow (as Peter Levenda, not as Simon obviously) that Dead Names is only “about 80% true”. I think it’s possible that some actual Sumerian/Akkadian/Babylonian texts were among the books stolen from Yale, and served as the source material, but it also seems Peter was doing a Solomon-style “grimoire origin story” with the Simon character.