From the bestselling team of Derrick Belanger and Brian Belanger comes a fun filled mystery adventure for kids of all ages. It is London, 1897, and a pleasant dinner with a very special friend, Sherlock Holmes, is shattered by a terrific explosion that plunges 10 year old twin detectives, Emma and Jimmy MacDougall, into an adventure that threatens all they know and love. A mad man, possessing a remarkable airship the size of two circus elephants, threatens not only the famous 221B Baker Street house, but all of England, even the world! The great Sherlock Holmes cannot solve this mystery...