Part-to-part relationships and the approach to governing their sensibilities is at the root of all architecture. The need for engaging in a dialogue around these systems is essential to contemporary architectural discourse and practice. Assembly builds on and extends the investigations of materials and representation techniques in the editors‘ previous books, Matter and Lineament. This book uses a collection of detailed case studies, explained by first-person authors, about experimental and innovative takes on assembling architecture. Bridging theory and practice, 17 projects and their principled approaches each demonstrate an important vein of inquiry within the topic. Essays probe issues such as latent and overt geometry, fabrication and technology, part-to-part elements, joinery and representation, material vernacular geometries, labor and place-based contextual assemblies, detailing, and pedagogical examinations. This text articulates the traditions and trends of material as the defining premise in the contemporary making of architecture. Its outcomes are applicable to beginning students of architecture and advanced practitioners alike.