I was working on this new book. Had someone thrown it across the room in a Keith Richards moment of wild abandon ?
At the same time I (randomly) opened Conservation Book Repair to page 81 and found the information about spine liner malfunction. As she points out if you’re going to go through all the trouble to rebuild the book, you might as well give the spine a little help in distributing the weight more evenly so you don’t end up with the dreaded V-shape.
You can download Conservation Book Repair from http://www.library.state.ak.us/hist/conman.html It’s free! I have a copy at home and one at the library.
Until the glue is dry the spine liner feels cool to the touch.