My vote goes to the book about Angela! Hahaha.
Have you considered writing a fiction book? I think a fiction book would be the best medium for explaining polarity. People need to step into the polarised perspectives to *get it* and fiction might be the tool for giving people the walk through.
Or how about 1st half fiction, with the 2nd half non-fiction, explaining what the fiction has just taken them through and how to apply it themselves. It could be magnificent.