The sound of danger

"England is in trouble! A priceless violin has been stolen, and there's only one person who can help: kid spy, Mac B. Mac's adventure takes him on a top-secret museum night watch and face-to-face with a mummy, zip-lining in Italy with his trusty corgi sidekick, and finally, on an undercover mission in the heart of enemy territory. But when he ends up as a captured prisoner, is the mission lost for good?"--Provided by the publisher.