Thanks to this Forum, he is now one of my favorite composers.
His Lyric pieces are out of this world. I am now working on one of his pieces Melody Op47 No3
So that being said there is stuff about him, but I think it's meshed with other stuff. Problably why you found nothing.
Peif Ove Andsnes has a great CD with some of the Lyric pieces on it. It's called Grieg Lyric Pieces. (go figure)
Anyway, that's all I listlen to these days, check it out if you want a taste.