Hi,
Could special:import be enabled on hr.wikibooks.org
https://www.mediawiki.org/wiki/Manual:$wgImportSources
Currently it is not enabled, and produces this message:
https://translatewiki.net/wiki/MediaWiki:Importnosources/en
Some pages from hr.wikipedia.org should be on hr.wikibooks.org, and import is the best option, since pages have long histories.
Thanks in advance,
Nesmir