I wanna give a goodbye gift to my best-friend (who isn’t bff anymore)

So can you please recommend me some good books.?

Any genre will do, if it’s romance-comedy or mudder-mystery . But all I want is “loosing a friend” topic (okay if it’s not the main but it’s supposed to impact the reader) like anyhow, if it’s because of a romantic partner or killed by some freak. (Want it to be fast paced)

All I want is an emotional story that will give a scratch in my bestie’s heart. Thank you !

by NoEmergency8715