The text as an entity
Books, i.e. printed pages bound together, encourage readers to think of the text as a finite and discrete entity. Books imply that knowledge is finite. There are only a certain number of pages to a book, so all the important knowledge on a topic must be able to fit in those 300-some pages. Presenting a text in book form also makes us think of it as an entity in and of itself, separate from all other texts.
Each bit of knowledge (a book) is self contained and not related to the other discrete bits of knowledge. We accumulate knowledge by building up stacks (libraries) of these individual bits. The printed book reifies knowledge. Books are something we can hold, something that we can see, and something that we can touch. We come to identify the book with the text (and the knowledge) that it contains.
The text as linear and hierarchical