Edinburgh University Press and Boydell & Brewer have joined Cambridge University Press' online platform.
The addition of EUP and Boydell will bring the number of titles University Publishing Online offers to 16,000 from nine global presses.
Edinburgh University Press, which publishes around 130 books a year in the humanities and social sciences, will launch with around 185 titles. Boydell, which publishes across the humanities, is scheduled to go live with over around 290 titles.
Timothy Wright, chief executive of Edinburgh University Press, said: “The unprecedented speed of change in the electronic publishing environment presents both challenges and significant opportunities for publishers. Cambridge has a great deal of experience of working with a global network of academic institutions, libraries and scholars. This presence will enable Edinburgh to continue to innovate in how we sell our books and journals using a single online platform whilst maintaining our individual profile and branding.”