They say she's working undercover for A.N.T.I.D.O.T.E, a group against animal testing - but how is that possible? She's not a spy - is she? Now she's on the run - and only you can uncover the truth. And you've got to crack a code to do it. A gripping story from the bestselling author of Noughts and Crosses, Malorie Blackman.
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