In 1981, Alberto Kalach founded the Taller de Arquitectura X (TAX). For 40 years, his work has focused on both private and public projects, ranging from chapels and houses to large-scale urban plans. ESTE book brings together m of 150 projects organized into six chapters or typologies 'Warehouses, Houses, Houses and Gardens, Towers, Assemblies and Roofs' that show a universe of explorations in torno to architecture and the city.