Artist Bill Walker, who created the iconic, psychedelic cover art for the Grateful Dead’s 1968 album Anthem of the Sun, will participate in a rare interview on SiriusXM’s Tales of the Golden Road show, which airs on the Grateful Dead Channel (ch. 23).

The interview, which will also feature Jon Estrin, who worked to uncover a lost collection of Walker’s Anthem art. A press release explains further:

“The background of the original painting was unfinished when the album was released. Twenty years later, Bill finally completed the 38” x 38” Anthem painting, with a meticulously detailed background. He released a Limited Edition run of 300 collector-quality Serigraphic prints of the mandala-inspired artwork, with 67 layers of silk screens printed with German oil paints on museum-quality paper. After the print run, the screens were destroyed and no other collectors’ prints were produced. However, most of these artworks were never sold.”

Through Estrin’s efforts, Walker’s remaining completed Anthem prints are now available via Anthem Prints.

The conversation on Tales From the Golden Road will air Aug. 4 on the Grateful Dead Channel. A selection of the remaining Walker prints are set aside for the show’s listeners, and fans can enter a contest to win a print here.