Crossfire (A Dick Francis Novel)

Shell-shocked after losing a foot during his tour in Afghanistan, Captain Tom Forsyth returns to his estranged mother's house. His mother has always put horses first and family last. But now she's being blackmailed for a hefty sum every week and being forced to make her horses lose. Using the skills he honed in the military, Tom sets out to find and defeat a hidden enemy before his mother's reputation is ruined, and he ends up back in the crossfire