“Postwar curtain walls occupy an unconventional position in preservation: instantly recognizable, yet built as thin, industrialized systems often not meant to last a century. Ayón and Pottgiesser take that tension seriously, pairing twenty international case studies—from 100 Park Avenue to the Rotterdam Library—with detailed photography and drawings that allow practitioners to weigh rehabilitation, overcladding, and even replacement as genuinely different paths, not interchangeable options. The publication is a focused, practical reference for anyone facing that decision for a postwar curtain wall.” — Kyle Normandin, AIC, APT | WJE