While the songs here are a great collection, what is not clear until you purchase the book is that the Carter's enjoyed playing the C chord shape, but not in the key of C. Therefore, most of the songs require non-standard tuning of your guitar - usually tuning DOWN frets (like from E to E flat) so even a capo doesn't help. Who wants to constantly be changing the tuning of all the strings just because you'd like to play one song?