Hello
I know there have been so many posts about the management of multiple series, about the possible workarounds, as to use custom columns to manage that.
And I remember reading some replies by Kovid saying he will not implement the possibility to manage multiple series in the series field, because it would be an huge change.
Anyway, I vote again for this functionality !
As an example, I use an excellent Android app,
Book Catataloque, to manage my physical library. This app allows to add several series in the series field. It's very useful;
I dream Calibre will have that functionality in a near future
Villard