Libraries Can Provide Enhanced Access to OA Works Providing access to open access materials has inherent challenges similar to those of other freely available digital works on the Internet. Schmidt et al. identify a number of these challenges: the effort required to effectively select and catalog (or otherwise create metadata for) high-quality OA materials from a pool of candidates that is not restricted by materials cost considerations; difficulties in tracking changes in dynamic OA materials and monitoring their availability when the library has no special relationship with the publisher or other supplier; lack of adequate coverage of OA materials in indexes, aggregator databases, and other conventional finding tools; the necessity of using search engines and specialized finding tools to identify relevant materials; and the broadened scope of information literacy programs to account for the peculiarities of these materials. 46 They also point out a unique challenge involved with open access in the mixed scenario:The hybrid character of the MOA environment presents other serial maintenance challenges for the library. A library might contain parts of the same journal in print and micro form, provide access to a part of the journal’s back file through an open-access archive, and provide access to issues through an aggregator. Access for a particular resource may undergo constant change as license agreements are renegotiated, embargoes are put into effect,and publication strategies evolve. Keeping up with this constant change, while making all these variations in access transparent to the patron, is an additional maintenance challenge for the library. 47 Consequently, the integration of open access materials into normal on-going library operations requires, as other Internet resources do, additional staff time and effort, even though the materials themselves are free.