Contents: 1. the seriousness of vagueness: Introducing European law and policies against hybrid threats
2. Legal aspects of hybrid threats: Making sense of the field
3. From hybrid warfare to 'cybrid' threats - and back? Concepts, challenges, responses
4. Why disinformation is here to stay. A socio-technical analysis of disinformation as a hybrid threat
5. The EU's 'hybrid' migration wars: A case of mistaken identity
6. The EU response to the instrumentalisation of migration: Towards normalised derogations, intensified border surveillance and flexible responsibility?
7. Soft authoritarian lawfare. Threats to democracy from within
8. EU energy security policy and hybrid threats.