Undoubtedly, "Humbug" is a thousand miles from the spiky, infectious riffs of "Whatever People Say I Am, That's What I'm Not" and the days of lines such as "you used to get it in your fish nets..." from the wonderfully-crafted "Fluorescant Adolescant". This development inevitably cut many of the loose, pop-hungry listeners from the Monkeys' Fan Club, as the album slips into more powerful, harsher depths - evident from its introductory moments, delivered by forthcoming single "My Propeller", which synchronises thudding drums with an uncompromising pound of electric guitars. Abandoned are the ground-level observations noted by front man Alex Turner in a heavy and (rightly) exposed Yorkshire accent - here, it is somewhat layered with a captivating eeriness. This is perhaps most notable on track six, "Fire and the Thud", on which Turner is accompanied by softly ticking drums and a bittersweet riff. Yet the likes of "Pretty Visitors" offers something quite contrary. It displays with perfect extravagance Arctic Monkeys' true capabilities. "What came first, the chicken or the d***head?" spits Turner, before ploughing on with chaotic force, until the song melts into its gothic, organ-laden chorus. The likes of "Dangerous Animals" (where, yes, the song's title is shouted out letter by letter - but unforgiving? Really?) is as deliciously engrossing as its fellow tracks, and, lyrically, is superb. "Cornerstone" is something slightly more romantic with a sweet, slow-paced melodic background, whilst "Dance Little Liar" offers a spooky combination of twanging guitars, and the hypnotic ease of Turner's and that of the backing vocals. "The Jeweller's Hands" will most likely provoke the use of "replay" several times, if not just for its beautiful end, where soft chants meet electric guitar solos and the album reaches its spectacular conclusion. "Humbug" certainly leaves the listener asking "What next?" in terms of Arctic Monkeys' development as one of the most significant alternative groups of the last decade. Although regardless of their next move, "Humbug" is a positive stepping stone in the right direction. 10/10.