Songs on this album are in a number of different styles, from cool and funky to lyrical and heavily orchestrated. The Hipgnosis designed sleeve is green with an image of the Eye of Horus It is variously reported as The Alan Parsons Project's best-selling album. ‘”Eye in the Sky” contains the Project's biggest hit, the title track with lead vocals by Eric Woolfson. The album itself was a major success, reaching the Top 10 (and sometimes the #1) in numerous countries. This album is the first of three the Project recorded on analogue equipment and mixed directly to the digital master tape.