A new heart-stopping thriller from internationally acclaimed crime writer Deon Meyer.      Why would a mathematics professor from Cambridge University, renting a holiday home outside Cape Town, require a false identity and 3 bodyguards? And where is he, now that they are dead? The only clue to the bodyguards' murder is the snake engraved on the shell casings of the bullets that killed them.     Investigating the massacre, Benny Griessel and his team find themselves being draw