The Case for Books: Past Present and Future by Robert Darnton
This book is a quaint, and nostalgic look at the physical form of the traditional book. In the parlance of the bibliographic scholar the 'codex'. The work itself is a collection of essays written by Darnton at various junctions in his career. Some of it should be common knowledge for those in the Library field but others not initiated will find the discussions about the Google Book Search Settlement and the staggering raise in price of journal subscriptions enlightening. Darnton also recounts the launch of his Gutenberg-e project, which was an initiative to create a series of ebooks for scholars of history. For me this was the highlight of the read.
The only hitch however is that the metaphor of 'ebook' is nebulous and probably won't make much sense in 10 years.