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.

When a rare jewel is stolen from the royal palace of the planet Onyxx, Jack and Wanda are hired to track down the thief. It looks like an inside job, but who can Jack and Wanda trust - and what is the thief really after?