The Alien Detective Agency series of reading books, featuring Jack Swift and Wanda Darkstar, are for children and young adults aged 8 to 14 and over who are struggling to read. Each book has been carefully written for those with a reading age of approximately 7 to 8, but are packed full of adventure and brilliant illustrations to really grab the reader interest.Jack and Wanda have gone back in time on the trail of an alien criminal mastermind, who has travelled back to Victorian London. Can the Alien Detective Agency solve the case of the Horror in the Chamber!