Chris Ryan 
Alpha Force: Rat-Catcher 
Book 2

Target: Drug Rat Alpha Force are an elite team of five highly-skilled individuals brought together to battle injustice. The team join a covert SAS operation in South America, fighting to catch an evil drugs baron. To gain information, they infiltrate a tight-knit community of street kids then head into the isolated mountains where a terrifying and twisted hunt is to test their individual skills to the max . . .Contains Chris Ryan’s top SAS tips for survival in cave systems.