Opera published by Konemann covers a lot of avant garde composers and is full of good pictures. Power House by Lime Tree is also well illustrated. Could anyone suggest any other books with good pictures of interesting productions.
The recent new edition of the Grove Book of Operas (not the Dictionary of Opera, even though one is essentially extracted from the other) has some very lush colour plates of modern productions. Not as many articles on recent operas as one would like, but ho hum.
(I didn't have a hand in this book, incidentally, but people I share an office with did.)