Thx, for namespace! But we anyway want to add Import from ru-wikibooks to ru-wikisource ;)
https://gerrit.wikimedia.org/r/264937 - this one is right.
Okay. well noted. I'm going to reschedule the change 264937 for deployment.
Really thx for help! :)
The change as been deployed 2016-02-11 0:44 UTC.
Could you confirm you can now import from Wikibooks?
@Dereckson: thx new source is appear! :)