Fab City Research Lab at IAAC, together with Making Sense EU consortium, produced this book as a part of the Making Sense project, which draws on nine citizen sensing campaigns in Holland, Kosovo and Spain in 2016 and 2017. During this period they have developed a form of citizen participation in environmental monitoring and action which is bottom-up, participatory and empowering to the community: this is called citizen sensing. If you are interested in best practices and tools for community engagement and co-creation, this book is for you.