Name the title of books written by author A.J.Ayer.
"A.J. Ayer" is the author_name;
SELECT T3.title FROM book_author AS T1 INNER JOIN author AS T2 ON T1.author_id = T2.author_id INNER JOIN book AS T3 ON T3.book_id = T1.book_id WHERE T2.author_name = 'A.J. Ayer'