For folks clearing out the parents' library, consider a donation to the Bibliotheca Alexandrina in Alexandria, Egypt
(yes, the one built to replace the famous one of old). But before that, figure out how to collect, accumulate, & ship books to the library in a way that is sufficiently low cost, somehow funded by donors, and in a way that tbe library signals a priori that it is willing to sift through on-site (and for which it signals it exert influence on the import authorities).
b/c despite its symbolic imoortabce, the library has a lot of empty shelfspace now two+ decades after its opening.
What the new library has in spades is prodigious fire-suppression technologies, so choose books you feel deserve special preservation into posterity.
What the new library has in spades is prodigious fire-suppression technologies, so choose books you feel deserve special preservation into posterity.