The purpose of this paper is to consider the best way of understanding the concept of informational privacy, including a discussion of what would be an appropriate theoretical framework and useful conceptual model; as well as how such a model can be used to investigate specific issues of library privacy.Two methodologies were used for the research: a literature review, and a thematic analysis of three pieces of data protection legislation. The research project is still in its relatively early stages, and the intention is to use several other methodologies to test the initial findings.Informational privacy is a derivative layer of other forms of privacy, and as such can only be properly understood in relation to each of the underlying privacy types. Where libraries rely for the delivery of their services on digital technologies provided by external vendors, they need to better understand whether and how those technologies impact upon each of the different types of privacy identified by (Koops et al. 2017).Using three pieces of data protection legislation to identify key themes does not give a complete picture of informational privacy; nor does it fully address the wider privacy implications. A detailed review of relevant case law on privacy from the European Court of Human Rights was not undertaken as part of this project. The choice of words and phrases appearing in data protection legislation and the subsequent grouping of them into broad themes is subjective.The observation that all library privacy scenarios have an informational privacy component alongside one or more privacy types has significant implications for information professionals intending to protect the privacy of their users; because, if correct, it means that simply complying with data protection laws does not fully address the protection of the underlying privacy types.