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What began as the Alliance's DDA Pilot in July 2011 morphed into a comprehensive approach to providing a core set of e-books to Alliance libraries and their patrons. At this moment, the Alliance manages both a demand-driven acquisitions model and an e-book subscription package on behalf of the consortium.

Demand Driven Acquisitions

The Alliance created the first of its kind consortial demand-driven acquisitions model in 2011. This initiative continues to provide shared discovery and shared purchasing of e-books on behalf of all 37 Orbis Cascade Alliance members. The service is facilitated by a partnership with YBP and ProQuest, and it is generously funded by the consortium membership.

The DDA component of this collection includes titles published in the last three years (currently 2012+), priced no higher than $200, and from a selected list of publishers.


A centrally-managed subscription to ebrary's Academic Complete, added in September 2014, dramatically expanded the total number of e-book titles available to all Alliance libraries. Academic Complete complements the DDA collection by providing an extensive number of back list titles, and it includes titles from publishers that do not participate in the consortium's DDA initiative.

Annual Reports