I bought a Mel Bay Essential Music Theory for Electric Bass today. I has a diagram about the Circle of Fifths but very little in the way of explanation. I was able to get more info off the web and have a better understanding now. Here is the question: Most Circles have the 5ths running clockwise and the 4ths going counter clockwise. Some go the other way. Is this a problem? At first I thought the book was misprinted until I saw some that were they same way online. Is one way more standard convention than the other? Also, what are the notes inside of the Circle correspondent to? For C major you have A minor and for G major is E minor actually inside the circle on the Mel Bay book, but with no explanation. I haven't seen it elsewhere. I understand that these are minor keys I think, but what is the relationship to the major? Thanks.