I became a fan of Dick Francis books back in the 1960s and have read every book along the way, eagerly awaiting the next in the series. Some I’m happy to read again and again, others less so. Regardless of whther he or his wife was the prime source of ideas they are good reads, albeit that some did relfect a somewhat sadistic streak.
In recent years a collaboration with son Felix emerged, and he has taken over the franchise in some style. Gamble is the lastest and carries on the fine tradition of whodunnits with a hero, plus a few close to him, in the firing line of the villain(s).
I won’t spoil the story by revealing what it is, but do recommend that you buy the book.
The Voice of the Bloke at the Back 