“Ensuring equitable participation in knowledge sharing requires barrier-free access for both readers and authors. Open models that eliminate author publication charges are therefore critical for inclusive participation, especially in the social sciences and humanities. MIT Press’s Direct to Open, along with other innovative open monograph models, is an important contribution to advancing open scholarship. SPARC encourages libraries to support D2O and other collective alternatives to closed market models."—Heather Joseph, Executive Director, SPARC