Help.Need a book for my female colleague

Me and my colleague were recently discussing about books and she mentioned she wanted to read books or even short stories,quotes or poems about romance

She has mentioned she is interested in books such as The kite runner ,the thousand splendid suns and I don't love you anymore

She is interested in these books but she now wants something that is romantic

Do you guys know of any good books on romance that I can gift her for her birthday

It would be even better if it is a collection of poems , quotes or love letters