The whole idea is great: nice colours, great pictures.... BUT.... It would (in my opinion) be even nicer if you would have used a filter at the fron cover. This way the picture of Elvis and the America studios will be more intergrated with eachother (blend). I'd also use a less bold font for the text on the backsite. Perhaps you could try to add the picture of the American Studio also to the backsite and make it like 60% transparant?
Keep up the great work