Every now and then some books pass through our lab that need a little more reinforcement before going to the shelves. Often these are ones that have a softer cover, design related, floppy, and can’t go to the bindery. 
What we like to do for these is to put a CoLibri cover on these books – by doing this we are then able to stiffen the cover by slipping a piece of 40pt. board between the inside covers of the book and the CoLibri cover. The covers come in a variety of sizes so they can easily accommodate books of various sizes.
We find that these covers hold up pretty well and are easy to replace if needed. They are a nice solution to these floppy books that will most likely be handled frequently.
Library and Archives Preservation 