When twelve-year-old twins Josh and Jessica visit their old gran in Tokyo, things aren't quite what they expected. For starters, her flat is the most high-tech place they've ever been outside Dixon's and, suffice to say, it makes them a little suspicious. But when their friend, popstar Kiki, is kidnapped and the twins set out to investigate, they find themselves aided by a mysterious hooded ninja. But who is this shadowy crimefighter? None other than their gran! She's been busting crime for as long as she can remember as one of Tokyo's secret ninja spies. But can the twins and their granny piece together the kidnap mystery and rescue Kiki in time? The first in the action-packed martial arts adventure series filled with crime-fighting action!

 

This book was published 2011 by Usborne Publishing Ltd .