Books in separate series but in same world

I Like now being able to add a book to a series folder and how all the information in that series world building will be there. However it would be great if we could have a way to do that with books from the same book world but that are different series. As some of the characters, plots, and such may be part of a different series. It would also be great if there was a way that when the information for series or the world gt added in the world building feature if there was a way to choose if you want that information included in that specific book/project. Ex. john smith is in book 1 or series 1 but you don’t want him included in book 2 but may be in book 3. If there was maybe a drop down we could click to choose if each character, item, location ect. was included in the current project being written. Maybe just a way to turn the character ect, in or out of current book, but still can leave it in the list for the series, or world.