Marie Lebert, independent researcher, now offers a concise history of ebooks open access through the Internet Archive: in English and French (with Spanish on the way):
https://archive.org/details/history-ebooks/
Topics covered include Project Gutenberg, ereaders, the British Library’s digitization work, Creative Commons, Wikipedia, and a timeline of the rise of ebooks. And Chapter 17 is a tribute to librarians throughout the world!