The market in academic monographs is problematic, and sales have been in decline for decades. Concurrently, Open Access models of publishing are being developed and open content licenses designating a ‘some rights reserved’ status for content have been employed to provide a legal framework to reflect the changing ways content is used online. In the context of these innovations, Frances Pinter and Nicholas Bown describe Knowledge Unlatched, a not-for-profit library consortium project which seeks to combine a financially viable Open Access model with the use of open content licences to create a more efficient market in scholarly books to the benefit of all stakeholders in the academic publishing ecosystem.