The studies showed that once the average human has reached the age of 80 they have lived a full life. So, in order to have a perfect life you must always die at 80. The medics give you certain medicines that slowly shut down your body so you can die quickly and peacefully. Cassia's grandfather just died 2 weeks ago. It still makes her sick to think that he is gone because they were so close. Before you die each person has their own "last banquet" this is when you invite your friends and family to celebrate your life. At his last banquet, each person in his son's family gives him a present. Bram, Cassia's younger brother gives him a rock from the Arboretum where their mother works. Cassia gives him a letter that has sentiments from the computer printed on. Grandfather tells Cassia that he loves it but also tells her that she needs to express her own originality and use her own words which is not allowed in the society. When the higher power killed off the old generation, they made a council that decided what poems, songs, games and other things they should keep. 100 of each category was kept so the citizens are not allowed to write their own words just print them off a computer program. Grandfather also gives a face compact to Cassia that was her Grandmothers but it has a note in it.
I haven't gotten up to the point in the book where she opens it and revels what the note says. I think it will be a letter containing secrets about the society from her Grandmother who was on the council. Or it might be from her Grandfather. As soon as I read up to that point I'll make sure that I report back!