"totally original and always captivating", and stating that "King Crimson, on this showing, have it in them to be huge." Melody Maker also noted that the album did not fully capture the power of the band's live performances, but that it "still packs tremendous impact", and that "this is one you should try to hear". Disc and Music Echo described the album as "a brilliant mixture of melody and freakout, fast and slow, atmospheric and electric, all heightened by the words of Peter Sinfield". The magazine stated that "this must be heard as a complete entity" and concluded that it would "establish King Crimson as a major talent". In the US, John Morthland of Rolling Stone said King Crimson had "combined aspects of many musical forms to create a surreal work of force and originality". However, Village Voice critic Robert Christgau called the album "ersatz shit". Later reviews of In the Court of the Crimson King have been positive, with AllMusic praising it "[a]s if somehow prophetic, King Crimson projected a darker and edgier brand of post-psychedelic rock" in its original review by Lindsay Planer, and calling it "definitive" and "daring" in its current review. In Classic Rock reviews of King Crimson's 2009 reissues, Alexander Milas described In the Court of the Crimson King as the album which "blew off the doors of musical convention and cemented these quintessentially British innovators' place in rock history for all time". In his 1997 book Rocking the Classics, critic and musicologist Edward Macan notes that In the Court of the Crimson King "may be the most influential progressive rock album ever released". Macan went on to argue that In the Court of the Crimson King presented an example of every significant element of a mature progressive rock genre. Further, Macan mentions that the album coalesces prog rock tropes and conventions, some of which are only established in the future, into a single congestable medium. The impact of these developments, in his eyes, is the album representing but also influencing the overall musical impact of progressive rock as a whole for decades to come. Paul Stump's History of Progressive Rock, published the same year, stated that "If Progressive rock as a discrete genre can be said to have had a starting point, In the Court of the Crimson King is probably it. All the elements that characterize Progressive's maturity are in place: jazz and