Who controls the space around an aeroplane seat: you or the person behind you trying to work on their laptop? Who owns your favourite football player? And why do Facebook and Google want your private data? In Mine! Michael Heller and James Salzman reveal the hidden economic and social rules that guide everyday life, demonstrating that much of what we assume about ownership is wrong. Whether a lost wallet, a playground swing or a London flat, Mine! explores what ownership means and why it governs everything we do.