The old guard. Book one. Opening fire

"This is a fairy tale of blood and bullets. It is a story about time, and age, and ages, and about friendship, and love, and regret. It is a story of two women and three men who cannot die. Mostly. Their names are Andy, Nicky, Joe, Booker, and Nile. They are soldiers, and their war never ends. They've been everywhere, seen everything, and fought in virtually every conflict through the present day. For centuries, they have kept their existence hidden, never staying in one place too long, always moving from mission to mission. But today, the shadows aren't so dark, and they are about to learn that secrets are impossible to keep. And you absolutely do not want to get in their way when those secrets are laid bare..."--Back cover.