Environmental issues are high on the public agenda and engineering projects need to take environmental concerns on board. Volcanic Rocks, contains papers from the ISRM Workshop W2 (Ponta Delgada, Azores, Portugal 14-15 July 2007), and focuses specifically on problems associated with construction activities in areas of volcanic rock. Volcanic Rocks highlights novel approaches and solutions to engineering problems in volcanic areas, covering a variety of topical themes, which include: characterization of volcanic formations; case studies; construction materials; earthquake engineering and rock dynamics; foundations; slope stability, and tunnelling.