Volcanic Rock Mechanics includes papers and special lectures of the 3rd International Workshop on Volcanic Rocks, Rock Mechanics and Geo-Engineering in Volcanic Environments, which was held within the framework of the Congress �Cities on Volcanoes6-Tenerife 2010� (Puerto de la Cruz, Tenerife, Spain, 31 May � 4 June 2010). The book is a comprehensive collection of the most relevant topics related to rock mechanics and geo-engineering in volcanic environments, including: - Geomechanical characterization of volcanic materials;- Instabilities in volcanic islands: Slope stability, large landslides and collapse phenomena;- Geoengineering and infrastructures in volcanic environments;- Construction materials. Volcanic Rock Mechanics is of interests to academics, engineers, consultants, designers, contractors and professionals involved in rock mechanics and geo-engineering in volcanic environments.