This publication brings together for the first time Anish Kapoor's (born 1934) architectural projects and ideas spanning the last 40 years. Kapoor's projects renegotiate the relationship not only between art and architecture but also between the very sense of space within ourselves and that of the external world. The forms he presents create spaces that blur the duality of subject and object, of interior and exterior. Monochrome fields of color, mirrored surfaces and fathomless voids all destabilize our place in the world. The more than 2,000 sketches, models, renderings and plans in this book show the journey of these forms to how they might exist in reality, as well as the spaces they inhabit or create, both outside and within us.