This album found Klaus Doldinger ditching the old lineup, so effectively a brand new Passport. This album is a mixed bag, there's a couple of numbers that throw you over the edge, and several experiments that are untypically Passport. Much of the Latin influence of Iguaçu is gone here, some of the songs here leans towards the instrumental Alan Parsons Project side of things, one electronic piece, couple that sounds like classic Passport, and a couple of more lightweight numbers. By the way, Ataraxia and Sky Blue are the same release. For some strange reason, Atlantic Records in the States felt it would be better titled Sky Blue, while the international release is called Ataraxia.

Passport is the creation of saxophonist Klaus Doldinger, who has stated that Passport is not so much a set group but a label and a name for his many projects. Doldinger, who had started out playing Dixieland back in the 1950s, by the following decade was a modern tenor saxophonist who also worked in the studios. His mind has always remained quite open and in 1970 he formed Passport to explore the combination of advanced jazz improvising with rockish rhythms. Passport matches Doldinger's reeds (tenor, soprano, flute, and occasional keyboards) with an electric rhythm section. The group's first recording (1971's Passport) also included Olaf Kübler on second tenor and flute, organist Jimmy Jackson, electric bassist Lother Meid, and drummer Udo Lindenberg.