Nielsen announced this morning that they have closed their Kirkus Reviews book review publication. Here are a couple of articles on the closure:
First They Came for the Trade Publication: Kirkus Closes (New York Magazine)
Kirkus Reviews Closes; Twittersphere Ponders Future of Book Reviews (MediaBistro)
Nielsen's Editor & Publisher has also been closed down. See the article on the E&P closure from Shawn Moynihan, E&P's managing editor/online editor.
As many of us know, the world of book reviews has evolved to include hundreds if not thousands of online review sources. One only has to browse through the reviews category in JacketFlap's blog reader to get a taste of what I'm talking about.