The document discusses ebook purchasing consortia models. It summarizes three pilots - Knowledge Unlatched, the Jisc eBooks Consortium Pilot, and the eBass25 Pilot. The Jisc eBooks Consortium Pilot involved 6 UK libraries and found very high ebook usage, with most titles being used by at least one library. Publishers were interested in the usage data but wanted to protect revenue. The document outlines challenges for publishers, aggregators, and libraries in establishing ebook consortia and discusses how libraries can work together on shared ebook purchasing.