Some have viewed sthe ascendance of the digital library as some kind of existential apocalypse, nothing less than the beginning of the end for the traditional library. But Weiss, recognizing the concept of the library as a "big idea" that has been implemented in many ways over thousands of years, is no so gloomy. In this thought-provoking and unabashedly optimistic book, he explores how massive digital libraries are already adapting to society's needs, and looks ahead to the massive digital libraries of tomorrow, covering * The ahthor's criteria for defining massive digital libraries * A history of Google books and the Very Large Digital Library, with a refresher on the initial protests of the scholarly communication community * Practices of massive digital libraries, and how traditional libraries are evolving to integrate their presence * A comparison of the collection development approaches of Google Books and Hathi Trust * Library applications, such as MDL for research in digital humanities, catalog integration through the Google Book API, Culturenomics, and the Google Ngram viewer * Case studies of library projects with Google Books, with analysis of aspects such as legibility of scans, metadata accuracy, culture, and diversity