Of course, there is no minimum limit, that is, there is only one e-book, also called a digital library.

Mainly depends on the specific scale and use of the library.

The general education industry and ordinary schools are generally tens of thousands of books, mainly some teaching AIDS and extracurricular reading materials; If you go to college, there will definitely be a lot of periodicals, papers, newspapers, magazines and so on.

And if it is other scientific research institutions, it must be more professional books, such as petroleum, geological research, science, and so on.

Generally speaking, it doesn't say how much it needs to be put at least, depending on the specific scale and use.

If you have any questions, you can call me!