Penguin Random House Children's UK Hacker

MESSAGE: THIS IS THE SYSTEM OPERATOR. WHO IS USING THIS ACCOUNT? PLEASE IDENTIFY YOURSELF ...When Vicky's father is arrested, accused of stealing over a million pounds from the bank where he works, she is determined to prove his innocence. But how? There's only one way - to attempt to break into the bank's computer files. Even if Vicky is the best hacker in the world, will she find the real thief before they find her?'Accept the expertise and race along with the plot' Observer