This paper highlights an overview of the conceptual approach to e-resource discoverability in academic libraries with a focus on research on the assessment of library catalog performance in the PatronDriven Acquisitions (PDA) model for e-book collection development. Although the published literature stresses the key role of the library catalog in the PDA model for e-book acquisitions, the findings in this paper show that, until now, there has been a lack of research on users’ e-resources searching behavior and PDA. As a conclusion, the authors think that in such a large universe of digital information on the Web, a new branded local catalog could be the way to visualize a more “tangible” experience between users and e-book collections.