Why would a cancer patient agree to test a drug that might not be effective on their own disease? And are researchers responsible if their research can be used to develop biological weapons? This collection of texts might not provide the answers, but at least give you some food for thought. Pär Segerdahl invites you on a journey through some of the issues that the Ethics Blog has dealt with in the recent years. He writes about researchers’ responsibilities, about participating in research and about information and integrity. But he also writes about ethics as such: What is it today, really? In this book you can read about data protection and population based biobank studies. But you can also read about apes writing articles and about the risk with knowing the risk.