How about a first edition copy of his favorite novel or another novel by the same author? If it's a rare or collectible book, he'll appreciate the thought and effort you put into finding it. Alternatively, if he enjoys reading on-the-go, giving him an e-reader or tablet could be a great option, along with a subscription to a digital book service. Finally, you could consider signing him up for a book of the month club or find a local book club he may be interested in joining.
Or you can get him a star map with the date when he was born.
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.