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_16907214_1 (paperback VARCHAR, title VARCHAR)
### Question:
What is the ISBN of "Dead as a Doornail?
### Answer:
SELECT paperback FROM table_16907214_1 WHERE title = "Dead as a Doornail"