Dick Francis' Bloodline

Another great best-selling mystery from the grand master of the genre ...
When race caller and television presenter Mark Shillingford calls a race in which
his twin sister, Clare, an accomplished and successful jockey, comes in second
when she could have won, he believes the worst: that she lost on purpose, and
the race was fixed. That night, Mark confronts Clare with his suspicions, she
storms off after an argument-and it's the last time Mark sees her alive. Hours
later, Clare jumps to her ...