Davina Dupree's Bizarre Birthday Balloon Ride: 6th in Egmont School Series

It's Davina Dupree's birthday, and her mysterious parents have bought her and best friend Arabella a luxury hot air balloon ride. At first Davina enjoys the ride, but when parts of the balloon start breaking down, Davina suspects foul play is involved. Will she and Arabella be able to pin point the culprit and stop the vandalism before the balloon starts to fall?