I am not sure if I understand you right,
but, in the present version of the plugin, series and serie-index are set to none.
I presume that if I don't set anything, nothing will happen to the series-info.
But I don't know what the effect is to the goodread info p.e..
In the next release I will give it a try.
In the next release I will also add a list of the booktitles that were rejected, if there is no exact match found. In that case you can select a title, that didnot match exactly, but is the right one.