This is my absolutely favorite novel by Dick Francis (don’t listen to the other review of Hot Money, it lies). Tor’s job in security for the Racing Commission requires him to be invisible… which in and of itself is intriguing. The unfolding of the plot as he’s sent to Canada pretending to be a waiter pretending to be a murder mystery actor is absolutely inspired. His quarry is a particularly nasty blackmailer and murderer, and even after reading it this book like 50 times, I’m still on the edge of my chair as he tries to keep the murderer from striking again…. and the final confrontation has me cheering in my seat!