Lots of bits of paper with squiggly things and pictures on them, glued together at one edge and usually covered top and bottom with slightly more substantial bits of paper.
Before teh internets, people used to read them.
Books do not support hyperlinks, however, so they are obsolete.
This category has only the following subcategory.
Pages in category "Books"
The following 106 pages are in this category, out of 106 total.
Media in category "Books"
This category contains only the following file.