England is in massive trouble, and a priceless historical violin has just been stolen. There is only one person the Queen can trust to get it back: Mac B, the smartest kid spy in the world. Your adventure begins on a top-secret night watch inside a creepy museum, where Mac comes face-to-face with an ancient mummy. But the danger does not stop there. You will travel alongside Mac and his trusty corgi sidekick as they zip-line across the beautiful landscapes of Italy and sneak deep into the heart of enemy territory. Just when things are looking up, Mac finds himself captured as a prisoner. Is the mission lost for good, or does this brilliant kid spy have one more trick up his sleeve? Get ready for a hilarious, action-packed journey filled with real historical facts, wild escapes, and a mystery that will keep you guessing until the very last page.