The music of country music's most beloved couple will be celebrated with a pair of upcoming Columbia/Legacy multi-disc sets.

The music of country music's most beloved couple will be celebrated with a pair of upcoming Columbia/Legacy multi-disc sets. Due June 7, "Johnny Cash -- The Legend" and June Carter Cash's "Keep on the Sunny Side -- Her Life In Music" will blend well-known and rare tracks in deluxe packages boasting extensive liner notes and vintage photography.

"The Legend" will span four discs and 107 Cash tracks, covering 1955-2002 and all of the Man in Black's major recordings for the Sun and Columbia labels. Seven of the included tracks are previously unreleased, including "It Takes One To Know Me." That track was written by his wife's daughter, Carlene Carter, as a teenager, and recorded in 1977. Carter recently added vocals to the recording that appears here.

The other unreleased tracks are "Doin' My Time," "I'm Never Gonna Roam Again," "When I’m Gray," a demo version of "Down In the Valley" and a version of Billy Joe Shaver's "You Can't Beat Jesus Christ" that all date to the early 1980s, and a 1973 recording of "I've Been Working On the Railroad"

A limited-edition package will include a hardcover coffee table book, a bonus CD recording of Cash's first radio appearance in 1955 and a DVD featuring the 1980 CBS television special "Johnny Cash -- The First 25 Years."

The two-disc "Keep On the Sunny Side" examines the 64-year career of his wife, a member of the seminal Carter Family and a spirited and soulful songwriter and performer in her own right. The set boasts 40 songs culled from such labels as Arhoolie, RCA, Dualtone and Columbia.