The book "Tummelplatz: Exploring playgrounds for creative collaborations" offers an in-depth analysis of temporary, creative collaboration in knowledge-intensive industries. It utilizes the concept of the playground, originally introduced by Sigmund Freud, to illuminate the optimal relationships between individuals in a professional environment. The authors, Dragana Trifunovic and Emily Moren Aanes, present empirical evidence showing that Freud's analogy is also applicable to the modern workplace. The book suggests using the playground as a framework to understand how exceptional outcomes can be achieved by considering structural and relational factors in temporary work contexts. Four structural enablers, which act as infrastructure, are identified, along with relational enablers referred to as architecture. These concepts promote dynamics and creativity in collaborative work environments.