This talk will outline the support systems that we see as vital for a flourishing OA books ecology as well as examining the challenges that are involved in both building and fostering engagement with such systems. In doing so, we will draw throughout on our experiences as part of the COPIM (Community-led Publication Infrastructures for Monographs) project, a partnership of researchers, librarians, publishers, and infrastructure providers that is in the process of building open and community-led infrastructures to support the funding, creation, dissemination, and preservation of long-form academic content. Books are only recently becoming prominent in conversations (and policies) about Open Access. The relative immaturity of the OA books la...