This e-book on "Living labs: concepts, tools and cases" comes 10 years after the first scientific publications that defined the notion of living labs, but more than 15 years after the appearance of the first living lab projects (Ballon et al, 2005; Eriksson et al., 2005). This 5-year gap demonstrates the extent to which living labs have been a practice-driven phenomenon. Right up to this day, they represent a pragmatic approach to innovation (of ICTs and other artefacts), characterised a.o. by experimentation in real-life and active involvement of users.While there is now a certain body of literature that attempts to clarify and analyse the concept (Følstad, 2008; Almirall et al., 2012; Leminen et al., 2012), living lab practices are still underresearched, and a theoretical and methodological gap continues to exist in terms of the restricted amount and visibility of living lab literature vis-à-vis the rather large community of practice (Schuurman, 2015). The present e-book aims to assist in filling that gap.