How about a collection of Sylvia Plath's works? You could get him a beautifully bound copy of "The Bell Jar" and "Ariel" along with other selected poems by Sylvia Plath. You could also consider buying him a biography about Sylvia Plath, such as "American Isis: The Life and Art of Sylvia Plath" by Carl Rollyson, or "The Silent Woman: Sylvia Plath and Ted Hughes" by Janet Malcolm. Another option could be a framed print of one of Sylvia Plath's writings or a quote from one of her poems.
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.