One idea could be a personalized leather journal with his name or initials embossed on the front cover. Another idea is a book that celebrates the art of writing, such as "On Writing" by Stephen King or "The War of Art" by Steven Pressfield. A typewriter or fountain pen would also be a great gift option, especially if he doesn't have one already. You can also consider enrolling him in a writing workshop or class, or even a writing retreat or conference to further develop his skills and passion.
Or you can get him 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.