By Stephen Thompson, NPR Music
When Tom Petty died unexpectedly last fall, the 66-year-old singer left behind a nearly 50-year catalog, from early garage-rock excursions with Mudcrutch to inescapable pop hits with The Heartbreakers to gentle solo folk-pop material. His released archive is massive and formidable — and it’s about to be joined by a box set with dozens of unreleased songs from across Petty’s long career.
Curated by the star’s family and bandmates, the 60-song An American Treasure, due out Sept. 28, is no greatest-hits set — Petty had enough of those to begin with. Instead, it plunders his sizable vaults for unreleased songs, outtakes, alternate versions, rarities, live tracks and deep cuts worth revisiting. (The package will also come in deluxe, vinyl and pared-down forms.)