book collection; library (personal/institutional)
Refers to a collection of books owned by a person, library, or institution. Often used in formal or written contexts.
His personal library exceeds 10,000 volumes.
The library's collection search has become more convenient.
He buys books every month, adding to his collection.
I organized my book collection when I moved.
This library has an extensive collection of books.
After retiring, he decided to get rid of his book collection.
図書館 refers to the library building or institution itself, while 蔵書 refers to the collection of books it holds.
書庫 is the physical storage room or stacks where books are kept, while 蔵書 refers to the collection of books itself.
Compound of 蔵 (storehouse) and 書 (book/writing), literally 'stored books'.