This is a set [WikiCategory] that is used to tag the [{ReferringPagesPlugin exclude='Category*' show='count'}] [Chapters] or subcategories.

! Related Pages

[{ReferringPagesPlugin exclude='Category*' show='pages' before='#' after='\n' columns='3'}]

! Sub-categories

[{ReferringPagesPlugin include='Category*' show='pages' before='#' after='\n' columns='3'}]

%%cat-border
[Categories|WikiCategory]: [Category.Books]
%%