The HIMSS Health Information Resources site includes an Introduction to HIE Concepts, Case Studies, White Papers, and more.
Additional resource:
Phillips, A. B., Wilson, R. V., Kaushal, R., & Merrill, J. A.. (2013). Implementing health information exchange for public health reporting: A comparison of decision and risk management of three regional health information organizations in New York state. Journal of the American Medical Informatics Association, 21(e1), e173-e177. https://academic.oup.com/jamia/article/21/e1/e173/791649