The author of the mystery novels was also an electrical engineer at Los Alamos National Laboratory. "The bedrock source" was published, according to Worldcat, in Los Alamos, and the "About the author" section on Amazon's page for "Engineer's Guide to High Temperature Superconductivity" mentions that he also writes the mystery novels. I'm not sure about the "Once a Country Bank" book, though. Could by him or could be somebody else.
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James D. Doss is currently considered a "single author." If one or more works are by a distinct, homonymous authors, go ahead and split the author.
James D. Doss is composed of 2 names. You can examine and separate out names.