This e-book on "Engineering education in sustainable development" contains six papers that were presented at the conference with the same title that took place at Barcelona, 27-29 October 2004. The purpose of this conference - the third in the series - is to explore the way future technologists are educated and the impact of their education in addressing global sustainability issues. One of the main outputs of the EESD II conference was the Barcelona Declaration on Engineering Education in Sustainable Development. This declaration [published in the Features section of this e-book] refers to the skills and training that today's engineers should acquire, the requirements that these impose on education, and the changes that are needed from the involved institutions. Its wording outlines the new dimensions to be considered in engineering, essentially linked to ethical, social and cultural issues, in addition to a logistic and systemic vision. This e-book also includes the winning paper of the new Leo Jansen prize for Best Conference Paper award.