Since their last expedition to Planet Mars, John, Penny, Aaron and Jimmy return to Tenerife on holiday at the villa next door to Pedro Armaz. Their family friend Ronnie Vines, his wife Sarah and Ronnie's new friend Jeremy Byrne accompany them. Ronnie has been anxious to write a children's space fantasy about Planet Mars and Jeremy has offered to help. They feel that visiting Mount Teide in Tenerife will help them take some realistic photographs for this project. However by accident they discover that Pedro and the children had been on trips to Mars and so Ronnie and Jeremy try to persuade Pedro to take them to Mars. Through a frightening series of events, Pedro and his family, the children along with their father and Ronnie Vines are abducted by Martian warriors and taken to the Red Planet. This is the beginning of a terrifying ordeal as the Martians finally seize The Wishing Book and take over Planet Earth, a feat that leads to world-wide chaos and devastation. This is the end of the world as we know it, unless they can get back The Wishing Book from the Martians - but how...? A gut wrenching, nail-biting and terrifying adventure, laden with intrigue and twists around every corner - an experience the children will never forget...!