Editor’s note: Maria Bonn’s essay, a review of the challenges of applying open access models to monograph publishing, is based on her presentation at the ALA 2010 Midwinter SPARC-ACRL Forum in Boston, MA. The entire Forum, “The ebook transition: Collaborations and innovations behind open-access monographs,” may be viewed online at www.arl.org/sparc/meetings/ala10mw/