Cirrus@Austlit

'Half a year ago in Macau, Will Slater waged war to rescue a nine-year-old girl from the clutches of a hellish industry. He left her with an old government colleague, who promised to find her a foster home and give her some semblance of a normal upbringing. Slater moved on...
'Now, deep in cartel-infested Colombia, he hears dark whispers of something called the Lynx program — a clandestine division that raises young girls and forges them into sociopathic killers. A division founded by the very same man Slater left her with.
'He drops everything and barrels toward answers. Because if you make Slater a promise, you’d better not break it. The kid was a shining ray of light in his otherwise barbaric reality, and he’ll sacrifice everything to make sure she’s safe...'  (Publication summary)