How about a beautiful leather-bound journal or notebook to inspire him to continue writing, with a personalized message or his name engraved on the cover?
You could also consider a set of high-quality pens or pencils, or even a writing workshop or class for him to attend and learn more about the craft of poetry. Another idea could be a book of poems written by his favorite poets or writers, or even a book that teaches poetry techniques and exercises to inspire his writing.
Or you can get him a star map with an important date you share.
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.