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 is acting weird, weirder than usual. Wanda suspects that something is up - but who would have guessed that she was going to meet his evil twin brother, Jake! Or is it?