Library Binders:
Guidelines for Library Binding from the Northeast Document Conservation Center: https://www.nedcc.org/free-resources/preservation-leaflets/7.-conservation-procedures/7.1-guidelines-for-library-binding
Find a professional binder for small or fragile jobs: The American Institute for Conservation of Historic and Artistic Works provides lists of qualified conservators, including book binders. People on this list have attained professional designation in AIC. This means they have had their training, knowledge, and experience reviewed by a body of professional conservators who are recognized in the field for their commitment to establishing and upholding professional standards, promoting research and publications, partaking in educational opportunities, and fostering the exchange of knowledge in the field. Search under the specialty "Books and Paper" when searching for binders. http://www.conservation-us.org/membership/find-a-conservator#.Wv8Rtpch3yQ