Here are some interesting books/articles/databases/web sites on the history and evolution of the book, in no particular order. Thanks to librarian Anne Harlow for pointing me to Book 2.0, the source for the first four entries below.
GAM3R 7H3ORY, by McKenzie Wark
Books In Time, Carla Hesse
The Printing Revolution in Early Modern Europe, Elizabeth Eisenstein
The Nature of the Book, Adrian Johns
Self, Culture, and Self-Culture in Modern America: The Early History of the Book-of-the-Month Club, Joan Shelley Rubin
John Playford and the Stationers’ Company, Nicholas Temperley
Learned Publishing (Temple does not subscribe to this journal, but much of the content is free.)