For Kindles: Use the
Metadata Plugboard
That takes Library data (in its proper locations) and inserts it into a field that the device uses. The Library remains untouched

eg
Code:
{series_index:0>5.2f|| - }{title} ->
I have K4, so I can put the series name into Collections (Kindle Collections PI. )
You must jailbreak you newer Kindle to do similar