The Deep End (Diary of a Wimpy Kid #15) by Jeff Kinney

In The Deep End, book 15 of the Diary of a Wimpy Kid series, Greg Heffley and his family hit the road for a cross-country camping trip, ready for the adventure of a lifetime.

But things take an unexpected turn, and they find themselves stranded at an RV park that’s not exactly a summertime paradise. When the skies open up and the water starts to rise, the Heffleys wonder if they can save their vacation—or if they’re already in too deep.