Sherlock and the disappearing diamond mystery - Sam Hearn

John Watson has barely settled into his new school, Baker Street
Academy, when his teacher Ms De Rossi announces a trip to one of
London's top museums, home to the Alpine Star, the world's most famous
jewel.
But the gem has been stolen - from right under their noses! The police
are soon on the trail and the whole of the country is talking
about the crime.
When police catch the thief along with the stolen gem, it seems the
case is closed. But Sherlock Holmes has other ideas. With John
and Martha at his side, can he uncover the mystery behind this extraordinary
gem?
Told through Watson's blog, detective notes, school assignments,
media reports, and energetic comic-strip illustrations, this introduction
to Arthur Conan Doyle's classic characters will have every
young super-sleuth hooked!