i know i have asked this question before, but really tearing my hair out now:-
20 Racy thrillers are his style (7) answers are fictional detectives. Answer should begin with F and come between Fen and Fidelma. Any help gratefully appreciated.
The clue is in "racy". I think the jockey Dick Francis may be of interest to you. He wasn't the fictional detective but all his crime novels are written in the first person.