It's best to ignore Graves's lettered exegesis and still to the numbered narratives. Or better yet, use his references to track down the sources.

This came up earlier in conversation today, actually: I don't have a single book on Greek mythology I'd recommend so much as the original texts (unless we're talking about an elementary-school child, in which case I have fond memories of the D'Aulaires' Greek Myths). But I may be biased. I'm sure there's a textbook somewhere with plenty of translated excerpts that I wouldn't hate.

His interpretation of Oedipus could make a brill adaptation, if it hasn't been done already.

You should write it. : )