The book "Semantic Keyword-based Search on Structured Data Sources" offers a comprehensive collection of research findings that emerged from the first international conference on this topic. The conference took place in September 2015 in Coimbra, Portugal, and was organized under the COST Action IC1302. This volume includes 13 revised full papers, 3 revised short papers, and 2 invited contributions, selected from a total of 22 submitted works. The topics addressed cover various aspects of semantic data management, keyword search techniques, as well as the challenges and solutions in the field of information retrieval and benchmarking for searching large datasets. The contributions provide valuable insights into current developments and trends in technology and IT, particularly in the context of social media and the social web.