From the bestselling team of Derrick Belanger and Brian Belanger comes a fun filled mystery adventure for kids of all ages. London, 1897: Ten year old twin detectives, Emma and Jimmy MacDougall, are having dinner with their good friend Sherlock Holmes when terror strikes. A mysterious airship the size of two elephants threatens to blow up 221B Baker Street and even all of England. Who is this mad bomber? Why is he attacking London? Sherlock Holmes can't solve this case alone. It is up to the MacDougall twins to use their wits and skills to find the hidden airship and save the world.