I often tell people about the industry expertise and reporting of Galleycat. Ron and Sarah do a great job of getting primary source quotes and insider info about the publishing industry. The website really is required reading for anyone who wants to learn about the business of books.
And lately, I’ve really enjoyed their commentary. For example, Ron pointed out the discrepancies in the almost daily “the sky is falling for American reading” reports. Sarah has also had some very persuasive, well-argued posts that stand out in my recent reading.
The point is, if you want to learn about publishing and read well-informed, well-argued commentary, check out Galleycat.