Public and academic libraries have been among the very best customers for publishers. The publisher–library relationship is effectively symbiotic with mutual benefits. However, the digital revolution, changing cost structures, long-term declines in library funding, open access, changes to copyright, fair use, and the first-sale doctrine have unsettled longstanding practices. Perhaps inevitably these transformations have led to libraries experimenting with establishing their own publishing initiatives, helping patrons to publish their own work, or in the academic setting partnering with existing university presses to develop new publishing models. The responsibility for curation, previously largely resting with libraries, has now become a responsibility shared to varying extents with publishers. —However, the way publishers and libraries interact is changing—considerably.