commemorative publication; commemorative book
A book or magazine published to mark a special occasion, anniversary, or achievement, often containing photos, messages, and historical records.
We published a commemorative book to mark the 50th anniversary of the company's founding.
The graduation commemorative publication includes photos of all classmates.
記念号 is a special commemorative issue of a periodical, whereas 記念誌 is a standalone commemorative publication.
Compound of 記念 (commemoration) and 誌 (magazine, publication).