In this fourth volume, Atelier Bow-Wow delves into the window behavioural characteristics in Nordic architecture, showing how climate and culture are strongly reflected in their windows. The works and influences of six architects are featured: Gunnar Asplund and Sigurd Lewerentz from Sweden, Alvar Aalto from Finland, and from Denmark, Kay Fisker, Arne Jacobsen and Jørn Utzon. After three years of research, the team visited about 235 works and measured 470 windows.