Max Bretzfeld is back in Berlin--as a British spy. His most dangerous mission is about to begin in the much-anticipated sequel to Adam Gidwitz's instant bestseller Max in the House of Spies . Max is on a mission. Well, two missions. One has been assigned by his British spymasters: Infiltrate the Funkhaus, the center of Nazi radio and propaganda. The other they have forbidden: Find his parents. Max Bretzfeld was willing to do anything to return to Germany, even become a British spy. Training complete and forged papers in hand, the radio wunderkind's missions have begun.

But nothing is as he expected. His parents are missing. Nazi intelligence is watching him. And the lines between lies and truth are becoming more blurred every day.