The AHRQ National Resource Center for HIT has a Knowledge Library with links to a wealth of information. Its home page says:
The Knowledge Library contains both evidenced-based and theoretical content gathered by health IT experts. The content is organized into two categories: Core Collection and Partner Contributions. The Core Collection contains items found by AHRQ National Resource Center experts to be of exceptional quality and central to the health IT discipline. Partner Contributions include content provided by professional societies and non-profit organizations experienced in health IT.