Although I'm not really a fan of horses and horse-racing, I do enjoy Dick Francis' books.
And Ellis Peters.
Andre Norton
Anne McCaffrey
Mercedes Lackley
Greg Bear
David Eddings
Elizabeth Ann Scarborough
Bill Bryson
China Mieville
Dalene Matthee
Alfred Hitchcock
Anselm Audley
Terry Pratchett
And a number of others whose names escape me momentarily.
There are many.....
James Michener
JM Coetzee
Wilbur Smith
Jeffrey Archer.........etc