An importer can import content from an external Wikimedia project to English Wikibooks. Users without the importer flag must make a request that will be handled by an existing importer or administrator. This is granted only to experienced users as an import will overwrite and merge the page histories of any existing content at Wikibooks under the same name. Normally imports are made to the Transwiki namespace to prevent this from happening before moving content into an existing book or creating a new one with the imported content as a base.
If you need to import large numbers of pages or import pages over a long period of time, you can request the flag at উইকিবই:অধিকারের আবেদন.