What is the number of books in abbotsford library of sir walter scott?
<answer> Sir Walter Scott collected around 9000 books and his library at his home at Abbotsford. <context> Sir Walter Scott (1771-1832) was an Advocate and one of the world's greatest writers. He collected around 9000 books and his library at his home at Abbotsford, near Melrose, remains much as he left it. The library is one of a relatively small number of world-class writers' libraries.