The house swap

"Allie is British and dreams of being a spy. Sage is an only child from sunny California. They meet when their families swap houses for the summer. Though they're polar opposites, Allie and Sage quickly realize that they're both dealing with family issues--Sage's parents may be on the brink of divorce, and Allie's struggling to feel heard in her big family. It may take a trip around the world for them to find their place at home. This sweet and emotional story is told in alternating chapters from each girl's point of view, offering two unique perspectives on family and belonging"--From the publisher's web site.