Going away gift for Roommate

What should I gift my 22F roommate? She is such a sweetheart and has helped me tremendously (lucky me🥺) during the time we shared a room. Now her course is done and she is leaving for home and I would love to gift her something special. She is a perfume lover and has quite a collection, I thought I will gift her a nice oudh perfume but I have no clue about the notes / lasting time. Also she is a literature student and loves collecting books, Would love your perfume suggestions or any memorable gift options. Budget is within 1k (since I am a broke college student)