Front Matter -- Understanding the Geological History of Volcanoes: An Essential Prerequisite to Their Monitoring / Patrick Bachèlery -- Volcanic Hazards / Raphaël Paris, Philipson Bani, Oryaëlle Chevrel, Franck Donnadieu, Julia Eychenne, Pierre-Jean Gauthier, Mathieu Gouhier, David Jessop, Karim Kelfoun, Séverine Moune, Olivier Roche, Jean-Claude Thouret -- Assessment, Delineation of Hazard Zones and Modeling of Volcanic Hazards / Jean-Claude Thouret, Sylvain Charbonnier -- History of Volcanic Monitoring and Development of Methods / Jean-François Lénat -- List of Authors -- Index