Most of the time, I already know certain ancient books are in my library, but not always. Is there a surefire and systematic way to find an ancient book in my library? For example, I know the Apocalypse of Peter is in the Nag Hammadi, so I can pull up the appropriate resource—for example,
https://www.logos.com/product/4240/the-nag-hammadi-library-in-english-4th-rev-ed?queryId=e80fd31e26672d3091ee2f184b3bc512
—and get there. But there are certainly countless others that I don't know where they are and whether I own a copy. It would especially be nice if I could find it in the original language. TIA.
Lew