Andy and the Jam Jar Genie book Four

Danny is back! Rufus is ready to compete in the Cosmic Dragon Races! The friends will come together one last time to help, but this time they must travel to Danny's world. The boys have sworn to be the best pit crew EVER! But when the girls go missing in the World of Genies the boys are just a bit distracted. Follow them, once again, on an adventure like no other! Find out that there is evil, even in Danny's world. What happens to Melissa and Trudy? Does Danny win the race? Do the friends manage to get through the experience in one piece? Cross your fingers and hold on tight! You are going to have a bumpy ride!