Is the book "The Beatles - Complete Scores" worth it?

I really want to learn as many of their songs as I can. I was looking for the actual sheet music, not tabs or chords, and this looks like what I want. But I've heard that there are mistakes in some parts. Are they significant? If so, is their a site or something that could list them so I could just write in the corrections in the book? I already known that some parts are written an octave higher, but that isn't a big deal for me. So is this book worth my money?