Currently when removing something from owned list, it just makes it like it was never on the list.
I think it would be good to have an option to have it on a got-rid-of list(or a nicer term for it).

That means you can keep track and not accidently rebuy books you have already decluttered and your friends wont got go thought you would like this book and you dont one to here is it as a gift (when the reason you dont own it anymore is you got rid of it)