number of books; number of volumes
Used when counting books, magazines, or bound volumes. Often appears in library, publishing, or inventory contexts.
The number of books in this library's collection is about 500,000.
Please tell me the total number of volumes in the series.
Compound of 冊 (satsu, counter for books) and 数 (sū, number). The reading さっすう results from the gemination of つ before す.