There is a brand-new book out about Prince Nicholas of Greece edited by Arturo Beeche (the original book was Nicholas's memoir and Mr. Beeche has made many valuable additions to the text). Looks very interesting and apparently has at least 80 pictures of various Greek and other royals in it.
Here's its page on Amazon:
http://www.amazon.com/gp/product/097...165289-2104705