2 Introduction 15 3 The influence of open access on monograph sales?: The experience at Amsterdam University Press 21 4 Modes of access?: The influence of dissemination channels on the use of open access monographs 39 5 Better sharing through licenses??: Measuring the influence of Creative Commons licenses on the usage of open access monographs 61 6 Patterns of information?: Clustering books and readers in open access libraries 83 7 Measuring monographs?: A quantitative method to assess scientific impact and societal relevance 105 8 Do developing countries profit from free books??: Discovery and online usage in developed and developing countries compared 153 9 Revisiting an open access monograph experiment?: Measuring citations and tweets five years later 167 10 Conclusions 193 11 References 221 12 Appendix: published articles and data sets 233