What are your favorite BA-related books? Why?

OK, so we’ve all heard of the Business Analysis Book of Knowledge, and some of us have read part or all of it. But there’s got to be more to reading about business analysis than the BA Bible. And I want to find out what I should be adding to my BA library. 

What are your favorite business analysis books (besides the BABOK, that is)?  Are there books you would tell others to avoid?  Why?  Have any made a real difference in the way you work?  In the way your organization works?

I, and I’m sure others, look forward to your recommendations.