6-CD LP-sixed box set with illustrated 88-page book. From 1936-1949, Bill Monroe made a series of recordings that laid the foundation for what is today called bluegrass. This collection brings together, for the first time, the complete works from that seminal era. It includes all 60 of the Monroe Bros. duets from 1936-38, all 16 of the 1940-41 performances that marked the very first appearance of Monroe's recordings under his own name, and all of the Columbia sessions from 1945-49, including the revolutionary sides with Lester Flatt, Earl Scruggs, and Chubby Wise. An added bonus is the inclusion of every alternate take from the Columbia sessions, a total of 50 previously unheard and unreleased out-takes, including an un-numbered master of a gospel song that was not even known to exist.