SQL Reporting Services Book
While travelling lately, I also finally finished reading Peter Blackburn & Bill Vaughn's wonderful book on SQL Reporting Services. I thoroughly enjoyed it although I did find their Harry Potter chapter 9 3/4 a bit over the top (and as you'll note below, I'm into reading Harry Potter).
Peter and Bill provide great coverage of pretty much every aspect of using the product from a developer's point of view. The only area I'd have liked to seen more on was using it from within Winform apps. However, that will be a good story soon with new Winform controls that can render RDL directly coming November 7th :-)
They also manage to cover some far-from-obvious topics that provide good advice.
Recommended.