Issues With Book Module Opening

I have been making books for many years using the LRC Book Module with a great deal of success.  A few days ago I wanted to update a previous book I made with some additional photos and text so I opened this file and transfered some additional photos to my collection.  I then made various changes in layout, added photos and changed text.  We then closed the program and backed it up as I needed to make additional changes at a later date. 

When I went back, looking at the Grid view, and tried to open this book is seemed as if all of the text was populated but only a few of the photos appeared.  Then the program seemed to have gotten hung up and eventually stopped loading.  I have closed LR and turned the computer on and off all with no sucess.  Now I cannot get to my book and need some guidence in what to do.