Par KNUSSEN OLIVER. Higglety Pigglety Pop! is the second of Knussen ’s two extraordinary fantasy operas created in collaboration with the acclaimed author Maurice Sendak. Composed between 1984-5 but finding its final form, after a number of substantial revisions, in 1999, the opera – subtitled ‘There Must be More to Life’ – is the story of a well-fed Sealyham terrier, Jennie, who escapes boredom t…