Zagat also wrote the "Doc Turner" stories that regularly appeared in The Spider pulp magazine throughout the 1930s and the "Red Finger" series that ran in Operator #5, and wrote for Spicy Mystery Stories as "Morgan LaFay".

Zagat was a graduate of City College who served in the US military in Europe during World War I.

After the war, he studied at Bordeaux University, then graduated from Fordham Law School.

In 1941, he was elected to the first national executive committee for the Authors League pulp writers' section.

After that war, Zagat was active in organizing writers' workshops and other assistance for hospitalized veterans.