Sentence:  ... such books are always close back&mdash;ie, the leather cover is always glued or pasted to the bare back of the book. After books have been <WSD>lined</WSD> the bands are put on if the style of binding admits of this operation. 
Meaning of the word marked with <WSD> tags:  To reinforce (the back of a book) with glue and glued scrap material such as fabric or paper.