The line is the constitutive element of every drawing and forms the core element of any design - for art, architecture, urban design or design in general. It resists reduction to simple linearity, but rather takes on complex and dynamic forms that attract the viewer in various ways, both consciously and suggestively. Whether analogue or digital, line is mobile as the forces, movements and effects that line produce are different for each type of line: straight, meandering, interrupted or even invisible. The book is a stimulating celebration of the manifold aspects of line, using unique examples from architecture, design and art, combining interviews with designers and essays by various authors

• Introduction : The line's contingencies / Ivana Wingham
• Alberto Peerez-Gomez
• Diana Agrest
• Gary Garrels
• Mark Cousins
• Marco Frascari
• Linear Territories : Urban linearity : the high line / Ricardo Scofidio
• Costas Varotsos
• Jeffrey P. Turko
• Jenny Lowe
• Ivana Wingham
• Anthony McCall
• Monika Grzymala
• Antoni Malinowski
• Duncan Bullen
• Casey Reas
• Angus Leadley-Brown
• Roderick J. Lumsden
• John Andrews
• George Hardie
• Andrew Benjamin
• Brian Hatton
• Gregory Votolato
• Teresa Stoppani Multiplicities of the line : 'Sketching' around Lineamenta / Lines from without / The line between drawing and painting / Psychoanalytic lines of thought / Forms of representation and architectural education / Lines in the expanded field / Performative lines / When lines intersect / Mediating lines / Trajectories of the Line : Durational lines / In/of/through/out / Ambiguous lines / Drawing colour : between the line and the field / Line Extensions: Processing lines / Vanishing lines / The moving oculus / Lines of travel / Toeing the line / Defining Lines : Notes on the line / Motive & Motif / Lines of passage : from horizon to design / Material and critical lines : Piranesi's erasures /