Good Mark Rothko Books?

I recently read Mark Rothko: a Retrospective. Are there any other Rothko books you would recommend?

Contemporary Art is probably a bit narrow for me, so I'm afraid I won't be of much help.

Have you read Lee Seldes' biography, The Legacy of Mark Rothko?

lilithcat, what did you find on Rothko, that you would recommend?

Hi there,
Got to suggest 'Artist's reality: philosophies of Art' by the man himself (edited by his son from notebooks, but done very well).