Caliber: Virtual Book Library Builder Caliber is our most customizable virtual book reader which helps you organize, share, and search library books. Caliber: Virtual Book Library Caliber is our most customizable virtual book reader which helps you organize, share, and search library books. Caliber: Library of Caliber Caliber is a digital library manager for e-books, which creates and manages a library of e-books in your browser. Caliber can be deployed in the cloud or locally. A library of e-books, Caliber: Library of Calibre: Wikipedia A library is a collection of items organized by author or title, used for reference purposes or for general study. In a library, items are categorized and ordered, or “collected”, or “read”. Libraries are typically in small collections of books. Caliber — Wikipedia Caliber is a library manager for e-books that takes care of all the tedious work of storing and retrieving books in your web browser. Caliber provides powerful, efficient search and retrieval, with powerful automatic formatting tools. Caliber can be installed in a web browser or installed locally.