Popular Repertoire for String Quartet. Stringworks is a series of popular music for working string quartets. Light repertoire pieces and entertaining encores are all expertly arranged by Jack Long. Each folio contains individual parts plus score for five pieces which can be performed separately or as a collection. Includes: (They Long to Be) Close to You Â· Goodbye to Love Â· Solitaire Â· Superstar Â· Yesterday Once More.