It was either Miles Davis "Nefertiti" or "Miles Davis at Fillmore." I had returned from Africa to small town rural NE Ohio and was miserable. Didn't know a lot of the music that my peers were listening to and on the radio and didn't like that much of it. Explored the library and found "Filles de Kilimanjaro" and "In A Silent Way" and that was the ticket. Within a few months I had my own copies of those, and "Nefertiti," "Miles Davis at Fillmore" and "Bitches Brew," I think in that order.