This document discusses options for open access monographs, as funders and institutions have been slow to mandate open access for monographs like they have for journal articles. It outlines different business models for open access monograph publishing, including author-pays models where the author pays a fee, models where libraries pay membership fees, and models relying on crowdsourced funding. The document also notes the Wellcome Trust's recent decision to extend its open access policy to include monographs and some challenges around making book chapters openly accessible through green open access repositories.