This report explores how publishers and authors can promote, nurture, and facilitate interaction with openly available books. Open access (obviously) opens up scholarship, but it also offers scope to enhance interactions between books, scholars, publishers, resources, librarians, and of course readers. This might take the form of creating communities and conversations around books, of gathering comments and hyperlinks, or of enabling updating, remixing and reusing, translating, modifying, reviewing, versioning, and forking of existing books. Open access, in short can create additional value and new avenues and formats that go beyond openness, by changing how people interact with books. Research shows that making books available in open access enhances discovery and online consultation (Snijder, 2019), but the short outline above makes clear that there is still a lot to be done to stimulate, explore, and practice the full range of book interactions made possible by open access. The first part of this report provides a literature overview that identifies the opportunities that digital technologies and enhanced interactions with open access books can provide for scholarship; it outlines some of the main types of interactions around scholarship—and around and as part of open access books more in particular—that scholars are involved in; and it showcases some of the experiments within humanities book publishing with reuse and remix; finally it presents some of the main (technological and socio-cultural) inhibitions that have prevented further uptake of these practices. The second part of this report more closely explores the technical dependencies that the introduced interactions and affordances rely upon. Doing so, it outlines and showcases various open source tools, software, technologies, platforms, infrastructures, guidelines and best practices, that lend themselves to being adopted by publishers and authors (or by publishers and authors working in collaboration with each other) to facilitate interaction around their book(s). The third part of this report then summarises the findings of the previous parts and provides recommendations, guidelines, and strategies (again, both socio-cultural and technological) for publishers and authors to further open up their books and collections to community interaction and reuse. Who is this Report for? The main communities we want to reach with this report are publishers and authors/scholars (or commu...