What is the order price of the book "The Servant Leader" in 2003?
"The Servant Leader" is the title of the book; book in 2003 refers to SUBSTR(publication_date, 1, 4) = '2003'
SELECT T2.price FROM book AS T1 INNER JOIN order_line AS T2 ON T1.book_id = T2.book_id WHERE T1.title = 'The Servant Leader' AND STRFTIME('%Y', T1.publication_date) = '2003'