Released in June 1966, Frank Zappa’s major-label debut was only rock’s second double album (Bob Dylan released Blonde on Blonde a month earlier) but it set a higher bar for conceptual audacity. A sardonic, satirical, weirdly entertaining predecessor to kitchen-sink productions such as Sgt. Pepper’s Lonely Hearts Club Band, Freak Out! combines Zappa’s deep passion for midcentury blues, R&B and doo-wop with an aspirational affinity for avant-garde composers such as Edgard Varèse and Karlheinz Stockhausen. (…) Pop parodies like “Wowie Zowie” may not necessarily stand the test of time, but Zappa’s tribal frenzies and consumerist parodies (hey there, “Weird Al”) resonate still. — Rolling Stone
The design of this cover is credited to Jack Anesh on the inner sleeve. Another version credits Artwork, Graphics, and Map Insert to Frank Zappa. The video below shows front, back and interior of the gatefold album, plus a cd cover.