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+# Changelog
+
+## 0.2.0 
+
+### General
+
+- removed roles and metrics from the book for now, as they lack content
+- fixed typos
+
+### Core Principles
+
+- added a more relevant study about pair programming to the collaboration principle
+- extended Ship / Show / Ask explanation in the collaboration principle
+- added SaaS vs. self-hosting example to the industry standards principle
+- simplified last paragraph in rules principle
+
+### Technical Foundation
+
+- added Hypothesis-Driven-Development 
+
+### Roles
+
+- added QA Specialist role
+
+## 0.1.0
+
+- initial release for early feedback
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