You can now download the pdf or read online, Sophie McKenzie's The Thief which was a 2010 World Book Day special and can only be bought second-hand now (and my library has *1* copy of!).
Read/Download The Thief here.
The Thief is a bonus Medusa Project story, originally written for World Book Day 2010 but no longer available to buy.
The events in this special story take place between The Hostage and The Rescue, but The Thief can be read as a stand-alone story.
The Thief stars the four Medusa teens, Nico, Ketty, Ed and Dylan. Following the explosion that ended The Hostage, the teens are sent to a boot camp in Spain - to learn some discipline, but also for their own protection. On the way there, the group are attacked and forced to carry out a high-risk diamond theft...