Freeman Wills Crofts (June 1, 1879 – April 11, 1957) was a prominent Anglo-Irish author and a master of the 'Golden Age' detective story. He is best known for creating Inspector Joseph French, a meticulous detective who relied on hard work and systematic investigation. A former railway engineer, Crofts brought a unique precision to his plots, often centering on unbreakable alibis and complex timetables. By focusing on realistic police procedures and exhaustive attention to detail, he earned a reputation as one of the Big Four' mystery writers of his era, fundamentally shaping the modern police procedural genre.