Yes are widely recognised as pioneers of progressive rock through their defining work in the 1970s, including classic records such as Fragile and Close to the Edge. The band then went on to completely re-invent themselves in the 1980s. They achieved huge commercial success with the album 90125 and global hit 'Owner of a Lonely Heart'. But there has been little acknowledgement of their achievements in the ten years that followed, paving the way for three more decades in an extraordinary 50 plus-year-long career. Examining six more albums, the arrival of multi-instrumentalist Billy Sherwood, successful tours, solo and film projects, a move into the digital age, and consolidation of a worldwide fanbase, Yes in the 1990s adds a fresh twist to the story of this revered band. Simon Barrow followed Yes closely in the '90s, seeing them dozens of times on both sides of the Atlantic. He charts an underestimated era of development in the Yes sound, encompassing multiple personnel changes. Bookended by notable tours for Union and The Ladder, the '90s is a tale of Yes-intransition, as the search for new musical horizons sees their influence mutate across everything from art pop to global fusion. AUTHOR: Simon Barrow is an author, publisher, commentator and independent academic. His numerous books include Solid Mental Grace: Listening to the Music of Yes, published in the band's fiftieth anniversary year. He lives in Edinburgh, Scotland.