Esta Spalding

"The Fitzgerald-Trouts are four barely related siblings living together in a small car on a lush tropical island, but when they begin to outgrow their small vehicle, they must band together to find a new home"--

"The plucky Fitzgerald-Trout siblings (who live on a tropical island where the grown-ups are useless but the kids can drive) are back! After losing the boat that had become their home, oldest Fitzgerald-Trout, Kim, has put finding a home back on her to-do list. When her sixth-grade history assignment offers a clue about the ruins of a volcanic house built by an explorer on Mount Muldoon, she and her siblings set out to find it. The castle they discover...

When Kai returns to give Erica a glimpse of her own mortality, it throws Erica for a loop. If Erica is to escape her own personal "Groundhog Day", she must learn to embrace the present.