The Scottish folk-ambient band the Blue Nile has enjoyed a mystique contrived by its inaccessibility and the infrequency of its recordings, but it has also made a series of critically acclaimed discs. The group was formed by three Glasgow natives who had graduated from university there: singer/songwriter/guitarist Paul Buchanan, bassist Robert Bell, and keyboardist Paul Joseph Moore. (Engineer Callum Malcolm and drummer Nigel Thomas have worked with the trio consistently, to the point of being considered secondary bandmembers.) (The Blue Nile is the title of Alan Moorehead's 1...