I too have been driven creatively by mania and was very curious. This is what she had to say about mania.
I love mania as long as it doesn't bleed into delusional thinking. I was very close to the cusp when I started writing scarlet begonias.
I'd been doing research on wikipedia like a mad person and have a drawer full of documentation supporting my theories, of which only a few finally became part of my research. So I need to write more to incorporate the other hypotheses.