This book explores the positions of small EU members in approaching external energy security, using Austria, the Czech Republic and Slovakia as case studies. It examines when small EU members support and when they oppose further development of cooperation at the European level in external energy security and argues that their preferences depend on their perceived ability to deal with the challenges of their energy policies. It finds that small EU members whose decision-makers believe that their states can successfully deal with these challenges do not support the deepening of European integration in external energy security as this would mean a loss of competences (and vice-versa), concluding that European integration is considered to be a response to perceived vulnerability.This book will be of key interest to scholars, students and professionals in EU politics and foreign policy, energy policy and security, and more broadly to security studies, European politics and international relations.