Celebrate the 50th anniversary of The Joker. J50: The Evolution of The Joker, curated by Steve Miller, highlights 27 previously unreleased demos, live performances, studio outtakes and rehearsals from Miller's personal archive, including 8 never-before-heard songs. Miller also provides narration guiding the "evolution" of the songs from The Joker.

The 2CD set includes liner notes from both Steve Miller & Anthony DeCurtis and classic photos.