A number of her books are set in the past.

The total number of books is not known, but it was certainly more than 30.

But a number of books on the subject are available.

He began but did not complete a number of books.

It is a great thing to start life with a small number of really good books which are your very own.

He has written a number of books on the subject.

Since his death in 1989, a growing number of books by and about James have appeared.

He had a number of books published in 1909, 1915 and 1930.

He is an author and has had a number of books published.

There are a huge number of books available on quality management.