OAPEN provides a platform for open access monographs and is exploring funding models for open access publishing. OAPEN's approach uses a hybrid model where the basic online edition is freely available open access while other editions can be sold. OAPEN is running pilots in the UK and Netherlands to test this model and measure the effect of open access on usage and sales. New projects are exploring open access monograph publishing in Sweden and across Europe through shared infrastructure between universities. Recommendations include using existing funds for publishing open access monographs and ensuring quality assurance through peer review.