From the #1 New York Times bestselling author of The Black Widow comes the thrilling new summer blockbuster featuring legendary spy, assassin and art restorer Gabriel Allon. A heart-stopping tale of suspense, Daniel Silva's runaway bestseller, The Black Widow, was one of 2016's biggest novels. Now, in House of Spies, Gabriel Allon is back and out for revenge - determined to hunt down the world's most dangerous terrorist, a shadowy ISIS mastermind known only as Saladin. Four months after the deadliest attack on the American homeland since 9/11, terrorists leave a trail of carnage through London's glittering West End. The attack is a brilliant feat of planning and secrecy, but with one loose thread.