Hooray for familiar Francis fast action and hero. Here his amputation is a foot and racehorse training is the family business. I always like Dick Francis, only he can make the sport interest me.
Tom, invalided out of Afghanistan, has nowhere else to go but to his unfriendly mother. To get her out of tax and blackmail trouble, he almost gets killed. Hard to distinguish friendlies from foes. I guessed partly, but shocked by the ending.
I went back to to find meaning in Francis titles, to distinguish formulaic plots, similar heroes, ordinary background folk. One guess is he gives away the solution in an obscure hint. The supposed friendly is an enemy, and shot dead?