Beat the Boots is a collection of bootleg recordings by Frank Zappa which were originally distributed illegally but were released officially by Rhino Entertainment in 1991. The recordings were available as individual CDs and as an LP or cassette box set. The eight discs span a fifteen-year period from September 30, 1967 ('Tis the Season to Be Jelly) to May 21, 1982 (two tracks on As an Am).
Zappa Records/UMe issued The Mothers 1970, a four-CD Frank Zappa box set which features 70 unreleased tracks from the short-lived 1970 line-up of the Mothers of Invention. The band during this period last around seven months and was Aynsley Dunbar, George Duke, Ian Underwood, Jeff Simmons, and Flo & Eddie (aka Howard Kaylan and Mark Volman).