The term MAYOR AUTHOR is composed of two crossword solutions, KOCH (4 letters) and EDKOCH (6 letters). KOCH is a surname of German origin, while EDKOCH is the full name of the late American politician, lawyer, and television personality Ed Koch. He served as the 105th Mayor of New York City from 1978 to 1989, and was known for his outspoken and often humorous style. After leaving office, Koch wrote several books and continued to be an active public figure.