Stumbled across this book via Stadt 2.0:
Transforming Cities. Urban Interventions in Public Space by Kristin Feireiss and Oliver G. Hamm.
One particularly interesting-looking article is “Pretty Vacant. Embracing Impermanence
in Architecture and Urban Planning” by Lukas Feireiss, which takes its clue from Italo Calvino’s Invisible Cities and the city of Sophronia. Haven’t been able yet to read it in full, but it promises an evocation of a kind of “temporary
architecture that contests the preoccupation of architecture
as being permanent”. Sample pages can be found here.