The Knowl Bookshelf aims to be a unified front-end for all of your ebook databases. Often, there may be significant structural differences between various ebook sources (i.e. Project Gutenberg Project, Internet Archive, Open Library, etc). Knowl Bookshelf mutates these differing sources into a common set of univeral Knowl fields. This consolidated/unified database is then presented to the end user as an elegant Single-Page Application (SPA).