Problem: When trying to add a source from an already displayed book in an article, I would love to "re-use" one of the listed book and add its page number, for instance. Then it automatically adds the correct reference.
Proposed solution: Like for what is already existing with citations, add a "Re-use" mode for all the already listed books in the bibliography section.
Who would benefit: Articles with a bibliography section which contains the "Template:Cite book".