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_20193855_2 ( year INTEGER, author_s__or_editor_s_ VARCHAR )

### Question ###
In which year were the authors or editors Delia Sherman?

### Accurate SQL ###

SELECT MAX(year) FROM table_20193855_2 WHERE author_s__or_editor_s_ = "Delia Sherman"