You could write notes in a book for her.
Nook & Burrow is a small gift shop in Melbourne that specializes in bookish items like candles, tea, and soaps.
Bookbrowse.com is a good place to explore.
Consider getting Page Anchor bookmarks. They’re elegant and last a long time.
I got my partner a candle that smells like books. Sounds strange, but she really enjoys the scent of old bookstores! Dusty Bookshelf Candle | Nook & Burrow
Consider getting a Kindle along with a Kindle Unlimited subscription. It’s an easy yearly gift.