The Darkest Hour (Penguin US)

Intelligence: high. Body: hard. Mission: what no one else can do. §It's been a year since ex-Navy SEAL Ethan Kelly saw his wife Rachel alive. Now he's received an anonymous phone call claiming Rachel is alive. To find her, Ethan will have to doge bullets, cross a jungle, and risk falling captive to a deadly drug cartel that threatens his own demise.§