The book ‘Moral Machines: Teaching Robots Right from Wrong’ discusses a world which depends more and more on (ro)bots' decision making in places like self-driving cars, stock markets and war zones. The authors highlight the complexity of the issues involved in the creation of Artificial Moral Agents from the limitations of Asimov's laws of robotics to the plethora of modern approaches and the need for a richer understanding of human morality itself. Despite the topic's complexity I liked the thoughtful call for a practical, step by step approach for its realization, and better sooner than later.
Link: http://www.amazon.com/Moral-Machines-Teaching-Robots-Right/dp/0195374045