Simplify the following text for a Grade 9 native English-speaking person.
Original: Dufty , a New York Post writer and editor then married to Holiday 's close friend Maely Dufty , wrote the book quickly from a series of conversations with the singer in the Duftys ' 93rd Street apartment .
Simplified: It was ghostwritten by William Dufty , a New York Post writer and editor who was married to Holiday 's close friend Maely Dufty .