There is /There are

There are not books

There aren't books

There is not a book

Yes, there are

No, there aren't

Is there a book?

Yes, there is

There is a book

There isn't a book

There are books

No, there isn't

Are there books?

No, no los hay

No hay libros

No, no hay

Hay un libro

¿Hay libros?

Sí, hay.

Hay libros

No hay un libro (contracción)

No hay un libro

¿Hay un libro?

Sí, los hay

No hay libros (contracción)