How can I reset my library to contain no books without deleting the actual books (and without having to delete each entry one at a time)?

When I open Microsoft Reader, the library contains thirteen pages of books; many are duplicates because I rebuilt most of the ebooks. How can I delete the contents of the library en masse without deleting the actual ebooks that the entries refer to? At least in Windows Media Player I am given the ability to select all titles, then asked if I want to delete the library references or the actual files.Start Free Trial