There are many potential use cases for a book which incorporates pages from multiple sources. For example, a book on [[wikivoyage:Cuba]] might include [[w:Special Period]]. Or, creating a bilingual pamphlet.

In theory this will be simple to implement, since rendering is already performed by an external server.

There are unsatisfied technical dependencies, however. For one, mwlib probably does not support more than one source wiki per collection, so an upstream bug should be filed.

Version: master
Severity: enhancement