Book excerpt: In EU Peacebuilding in Kosovo and Afghanistan: Legality and Accountability Martina Spernbauer offers a comprehensive account of the EU's peacebuilding toolbox in light of the Union's constitutional architecture under the Treaty of Lisbon. A detailed analysis of EU peacebuilding in Kosovo and Afghanistan, with a focus on the security and justice sectors, demonstrates that the Union's continuous dichotomy between the Common Foreign and Security Policy (CFSP) and other Union policies is difficult to maintain for this multi-faceted, comprehensive policy framework, which lies at the interface of security, justice and development. Within this analysis, the central questions of compliance of EU external action with international law and international human rights law in particular under CFSP, as well as accountability towards third countries and their nationals are addressed.