Thanks Adoby. My intention is to 1st get to know Linux better before I make a decision. I would like to completely switch to Linux too, but in the interim, I don't want to transfer all files, so would like to share as much as possible.
I don't want to use Calibre in a different way from my other programs, so I will probably eventually import all the Calibre data into Linux.
As for LibreOffice, I am aware of the Windows version, but here too, I would not do a complete switch at this stage.
Anyway, I need to tread with care & good sense.
Thanks for your advice, I appreciate your warning about the risk of sharing.
Cheers for now.