Can I publish a monograph in Open Access?

Yes. 

 Although OA for journal articles is well developed, OA for monographs is a nascent area and practices are far less standardised. However, a growing number of publishers allow the digital version of a book to be published in OA at the time of publication (Gold OA). The Directory of Open Access Books ( DOAB ) is a list of peer-reviewed academic books. OpenEdition is another platform primarily for French-language books. Both are excellent sources for finding publishers that already publish in Open Access. Publication costs for Open Access books are funded by the SNSF for all researchers in Switzerland. 

 It is also possible to publish books in Open Access via the Green route (Green OA), i.e. self-archiving of the manuscript with opening after an embargo. In this case, researchers must negotiate with publishers on a case-by-case basis.