Now can you list the titles of the books and the prices but in descending order?
SELECT t2.price, t1.title FROM book as t1 join publication as t2 on t1.book_id  =  t2.book_id order by t2.price desc
list titles of the books refers to SELECT title; prices refers to SELECT price; descending order refers to ORDER BY column_name DESC; JOIN is used to combine rows from two or more tables based on a related column between them.