How about buying her a subscription to a book club? This way, she would receive a new book every month or every other month, depending on the subscription you choose. Alternatively, you could also get her a Kindle or other e-reader if she doesn't have one, so she can read books on the go. If you prefer a more traditional route, you could purchase some of her favorite books, or books from her favorite author, and create a personalized library for her at home.
Or you can get her a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.