What is the average quantity of each order for the book "Life Without Fear"?
qty is abbreviation for quantity; average quantity order = AVG(qty)
SELECT CAST(SUM(T2.qty) AS REAL) / COUNT(T1.title_id) FROM titles AS T1 INNER JOIN sales AS T2 ON T1.title_id = T2.title_id WHERE T1.title = 'Life Without Fear'