Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_20174050_23 (reader VARCHAR, format VARCHAR, author VARCHAR)
### Question:
who is the reader on the download/cd format of the title written by author lidster, joseph joseph lidster? 
### Answer:
SELECT reader FROM table_20174050_23 WHERE format = "Download/CD" AND author = "Lidster, Joseph Joseph Lidster"