This article discusses an assessment and deselection project of the modern print book collections in the John Paul II Library, National University of Ireland Maynooth. Following a contextual introduction and literature review, the article outlines the methodology, presents and discusses the results, and concludes with lessons learned. Although this project had its origins in planning for a major extension to the Library, its main aim was to ensure current and relevant print book collections. The purpose of the article is to share experience in the hope of it being useful to other libraries considering a review of print book collections.