You might enjoy
Secret of the Lost Ark and
Grail Mission at:
http://www.xeper.org/maquino
I wrote
SLA a week or so after seeing
Raiders in a Georgetown theater in 1981. At the time I was assigned to the Defense Intelligence Agency, so I used the excellent resources of its library, and those of the CIA and the State Department's Foreign Service Institute, to polish
SLA's background. All of the references and extracts in it are authentic. It caused a minor stir at the time, and I received a very nice note from someone whose name I won't drop here about it. But I doubt that it's in the running for
Indy 4!
Grail Mission was done some years later, in 1998. Again all of the places, references, and quotes are authentic. Once again - since I wrote these stories for personal friends - I dropped some of them in. (H.P. Lovecraft used to do this with his stories, and I liked the idea.)
SLA was also motivated by a bit of dissatisfaction with the archaeological precision of
Raiders, as well as its end, which I thought "dangled". Similarly
GM was a sort of "alternate take" on the Grail theme, but was not a sequel to the third Lucasfilm. It was also a bit more tongue-in-cheek than the very-serious
SLA, in part because it had some fun with readers of the first story who were really concerned about its reality.
Please note that Adobe Acrobat or AA Reader v.5 or more recent is necessary to open these two .pdf files. I'm not trying to make things difficult - just minimizing incorrect or incomplete cut/pastes of these around the Internet. There is a link on my page to the free-download site for AA Reader if you need it.
Note also on the same page
The Dark Side, an "alternate
Star Wars", as well as the more recent
Morlindalė, the memoirs of Melkor and Sauron.
Enjoy!
Michael Aquino
Xeper@sbcglobal.net