My approach is to have a square booklet in the same place as the CD on the cover. I will have to design around this.
I have taken a look specifically at the Led Zeppelin covers that they have had in the past to see if there is anything that distinguishes them from others. In all honesty, they all seem very different. It seems to be the artist that dictates the theme of the cover on most cover. Jimi Hendrix is hosted by a psychedelic theme for example. It seems logical to design the cover to fit with my range of design.
Led Zeppelin Covers