Digitally remastered and expanded two CD edition. Includes bonus CD containing additional tracks including b-sides, edits, demos and more. Introspective is the third studio album by British synthpop duo Pet Shop Boys. It was first released on 11 October 1988 and is the Pet Shop Boys' second-best-selling album, selling over 4.5 million copies worldwide (their fifth studio album, Very, sold more than 5 million copies). It is so named because "all the songs, although it's a dance album, are introspective". Perhaps the biggest change in Pet Shop Boys' sound evident on this album is an increasing attention to orchestration using real orchestras, particularly on the Trevor Horn-produced "Left to My Own Devices", which took months to produce.