A sad anniversary today: It was one year ago, on Oct., 2, 2017, that Tom Petty died at age 66 of an accidental overdose of pain medication — a cause his family linked to a fractured hip that worsened during what turned out to be the Grammy-winning great’s final tour.

Petty’s death rocked fans both because of its unexpectedness, and because of the wealth of Petty’s contributions to the American rock songbook. The latter point was driven home last week with the release of An American Treasure, a mammoth, 60-track box set of Petty rarities, unreleased cuts, radio promos and live performances of classics such as “I Won’t Back Down,” “Into the Great Wide Open” and “Southern Accents.”

Here’s what you need to know about an American treasure’s An American Treasure:

Artists: Stevie Nicks, Tom Petty

Related Artists: Fleetwood Mac, Buckingham Nicks, Lindsey Buckingham, Christine McVie, Pat Benatar, Heart, Kate Bush, Linda Ronstadt, The Pretenders, Don Henley

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