CREATE TABLE publication (publication_id DECIMAL, book_id DECIMAL, publisher TEXT, publication_date TEXT, price DECIMAL)
CREATE TABLE book (book_id DECIMAL, title TEXT, issues DECIMAL, writer TEXT)

Show the titles of books in descending order of publication price.
SELECT T1.title FROM book AS T1 JOIN publication AS T2 ON T1.book_id = T2.book_id ORDER BY T2.price DESC
SELECT "T1"."title" FROM "book" AS "T1" JOIN "publication" AS "T2" ON "T1"."book_id" = "T2"."book_id" ORDER BY "T2"."price" DESC NULLS LAST