The Orbis Cascade Alliance is a consortium of 37 academic libraries in Idaho, Oregon, and Washington that serves over 258,000 students. In 2010, the Alliance formed an ebook team to explore demand-driven acquisition of ebooks through YBP and EBL. The initial funding model was based on member dues but later changed to a formula based on FTE, materials budget, and an even split. Between 2011-2013, over 1,000 ebooks were purchased and over 18,000 titles were accessed over 265,000 times through short-term loans. The Alliance continues to work with publishers and YBP to adjust its model and grow the ebook collection while controlling costs in a steady-state fiscal environment