This video demonstrates one way to convert a paperback novel into a hardcover book using the original covers on the new book. I recommend this is only done to modern machines bound books of no monetary or historical value. The book I use has a fundamentally sound Perfect (heat activated adhesive) binding. I do not muck with this. If you have a book that is falling apart then the book needs to be completely pulled to single sheets, the spine edges cleaned, and the text block rebound using the double-fan (aka Lumbeck) method.