If I purchase Finnair and Cathay tickets separately, could they link the bookings at check-in so that my luggage can be tagged through to my final destination?

Thank you.

Should I download a particular format of a book to be able to use the Assistive reader feature (Text-to-speech) on my Kindle Paperwhite? Thanks!

I’m a OW Sapphire member and I will be travelling with my parents. I understand that I could only have 1 guest. Any means of bringing both of them in? Thank you.