^ That is kind of true, actually. I usually buy mp3 albums these days. But we should remember that none of the Beatles' music is currently available as a legal download, so in this particular case, the CD book wouldn't be entirely useless.
However, when it comes to Beatles music, I always buy an official CD. It's just the collector in me, I guess, so someone like myself might be able to use that CD book. But I would assume that younger and more tech-savvy fans will mostly stick with mp3's that they can just obtain from friends or illegal downloads and the such.
The album artwork book is still my favorite item. I hate to ask you to break up this set, but you should consider selling it as an entirely separate book at a lower price. Out of everything, that is the main thing I would consider purchasing.