Because sometimes the book can be as valuable as the knowledge it contains.
Libraries are the custodian of human knowledge. They can also be the custodians of rare and valuable collections of books. This coverage is for the special collections many libraries have that need to be cared for and insured separately from the general circulation volumes. This coverage provides the special valuation required to secure the funds required to replace rare books and documents. Additionally, it is written in broad language, so the risk management of the rare book collections seamlessly integrates with the rest of their operations.