Definition: Generate a correct and concise answer for the question based on the words in the context.
Input: Context : Three Doors to Death is a collection of Nero Wolfe mystery novellas by Rex Stout, published by the Viking Press in 1950 -- itself collected in the omnibus volume Five of a Kind (Viking 1961).
Question : The Three Doors to Death is part of a what series?
Output:
Nero Wolfe