2 CD set. Widely regarded as one of country music's most legendary and influential artists, Merle Haggard's rich voice, superb musicianship and finely crafted songs have captivated audiences and critics alike for albums four decades. 40 GREATEST HITS is a 2 volume set that contains 40 of Haggard's most celebrated hits and classics like: "Mama Tried," "The Fightin' Side of Me" and more!