Except for two novels and some short stories Evan Hunter wrote when he was starting his career, he does not write mysteries.

On the other hand, Ed McBain writes nothing but mysteries.

Here's a clue.

Nowadays, if you see the name Evan Hunter on a book jacket, the book wasn't intended as a mystery. If you see Ed McBain on the jacket, the book better be mysterious or he will quit writing altogether.

This is what Evan Hunter has written: