The changing nature of reading?

How is the growing use of e-books chaining academia and the publishing industry? In the world of books, "the times they are a-changin'", as Bob Dylan told us. And if bookshops and publishers are going through intense upheaval, this must affect the most compulsive producers and consumers of the written word - academics. In what economists might call the "value chain" of reading, there are four distinct stages, all of them changing in unnerving but…