Foreword - Thomas Padilla Introduction: The Library Catalogue Data Ecosystem - Paul Gooding, Melissa Terras and Sarah Ames Chapter 1: Making the Conceptual Concrete: Defining, Describing and Visualising Collective Collections - Brian Lavoie Chapter 2: Effects of Open Science and the Digital Transformation on the Bibliographical Data Landscape - Péter Király, Tomasz Umerle, Vojtech Malínek, Elzbieta Herden, Beata Koper, Giovanni Colavizza, Rindert Jagersma, Leo Lahti, David Lindemann, Jakub Maciej lubocki, Alexandra Milanova, Róbert Péter, Nanette Rißler-Pipka, Dorota Siwecka, Matteo Romanello, Marcin Roszkowski, Mikko Tolonen and Ondrej Vimr Chapter 3: Data Quality in Library Catalogues and its Impact on Access, Analysis, and Reuse - Gustavo Candela Chapter 4: Data Bias and the Natural Language Processing of Metadata - Lucy Havens Chapter 5: 'Contains Scenes of Mild Peril': Illuminating the Catalogues of Dark Archives - Martin Paul Eve Chapter 6: Book Formats, Printing Practices and Reading Habits in Early Modern Europe - Mikko Tolonen Chapter 7: '(S)hut not thy Heart, nor thy Library': Realising the Potential of Historical Library Borrowing Data - Katie Halsey and Matthew Sangster, with Brian Aitken, Karen Baston, Maxine Branagh-Miscampbell, Alex Deans, Jaqueline Kennard, Gerard McKeever and Joshua J. Smith Chapter 8: ChatGPT for Bibliometrics: Potential Applications and Limitations - Daniel Torres-Salinas, Mike Thelwall and Wenceslao Arroyo-Machado Chapter 9: Using Generative AI to Turn 19th Century Library Catalogues into Data: Applications and Limitations - Julia Bauder and Christopher Jones Chapter 10: A Corpus Linguistic Analysis of Catalogue Data: Understanding Curatorial Practice Over Time - Rossitza Atanassova and James Baker.