Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE publication ( Book_ID VARCHAR, Price INTEGER )
TABLE: CREATE TABLE book ( Writer VARCHAR, Book_ID VARCHAR )

### Question ###
Show writers who have published a book with price more than 4000000.

### Accurate SQL ###

SELECT T1.Writer FROM book AS T1 JOIN publication AS T2 ON T1.Book_ID = T2.Book_ID WHERE T2.Price > 4000000