Diary of Dennis the Menace: Rollercoaster Riot! (book 3)

All aboard The Vomit Comet! Guess what fellow menaces - The World's Biggest Rollercoaster is opening in Beanoland this summer! I just need to win an easy-peasy competition to be the first Bash Street School student to ride it - and I might have to trick a few Softies as well...