Link roundup

Product Ownership

• Becoming a Great Scrum Product Owner (eBook)

Testing

• Bridging the Communication Gap: Specification by Example and Agile Acceptance Testing (book)
• JNarrate: Tool that allows you to write acceptance tests with code using a fluent API
• Craft of Software blog: Matt Heusser's new blog for testers
• Software Craftsmanship: Google group
  

Best Practices

• Linda Rising podcast on Retrospectives
• Kanban and Retrospectives
  

Agile

• “Seven Years Later: What the Agile Manifesto Left Out” presentation by Brian Marick at Agile Development Practices