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 table_2512935_8 ( approximate_sales VARCHAR, author VARCHAR )

### Question ###
What are all approximate sales for the author Laura Ingalls Wilder?

### Accurate SQL ###

SELECT approximate_sales FROM table_2512935_8 WHERE author = "Laura Ingalls Wilder"