PHOTOBOOK 01 suggests this is the first volume in a series, often organized to showcase different angles, venues, or moments from the night.
It looks like you're referencing a filename: with the note “solid feature.” -iGay69- NYE PHOTOBOOK 01.rar
If this is a file you’ve downloaded, please be careful — RAR files from unknown or adult-oriented sources can sometimes contain malware or violate platform policies. I can help with extraction steps, file safety checks, or finding open-source tools like (Windows/macOS/Linux) to open .rar files. PHOTOBOOK 01 suggests this is the first volume