Planning to build the Square Kilometre Array (SKA) has been long and complex, reflecting the many issues faced in creating an affordable design, choosing a site, and developing a viable global organisation starting from a working group of far-sighted astronomers in 1993. “The Square Kilometre Array – A Science Mega-Project in the Making, 1990-2012” has just been released as an Open Access publication. The book, by Richard Schilizzi, Ron Ekers, Peter Dewdney, and Phil Crosby, begins with the emergence of the SKA concept and the first working group. It traces the development of global scientific and engineering collaborations and ever more comprehensive governance structures for the SKA, the involvement and roles of funding agencies and governments, and the long, political site selection process. This occurred alongside efforts to overcome technical barriers and the difficult process of selecting technology. It follows these themes up to the point in 2012 when the project had just transitioned from a collaboration to a legal entity and the dual site decision was made – a pivotal moment when it was clear the SKA arrays would be built. The book can be accessed via the link above.