The Ninth Laugh-Out-loud, Fully-Illustrated Diary Of A Wimpy Kid Book From #1 International Bestselling Author Jeff Kinney! A Global Phenomenon With 250 Million Copies Of The Series Sold Worldwide! The Heffleys Are Off On A Road Trip! The Chances Of Survival Are ... Quite Small To Be Honest. Greg's Idea Of A Good Summer Is Air Conditioning And Lounging In Front Of The Television. But His Mum Has Different Plans, And Now His Family Are Having An \"Authentic\" Summer, Trapped Together On A Road Trip. And Greg's Soon Battling Petrol-Station Bathrooms, Crazed Seagulls, A Fender Bender And A Runaway Pig. But Even The Worst Road Trip Can Turn Into An Adventure - And This Is Going To Be One That The Heffleys Will Never Forget!