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The Doctor and his friends go undercover to stop the mysterious Mr Symington and Mr Blenkinsop.

About the Author

Naomi A. Alderman's first novel, Disobedience, was published in 2006 in ten languages and won the Orange Award for New Writers. In 2007, she was named Sunday Times Young Writer of the Year, and one of Waterstone's 25 Writers for the Future. Her second novel, The Lessons, was published in April 2010. Naomi was lead writer on the BAFTA-shortlisted alternate reality game Perplex City and writes a weekly games column for the Guardian.