Invisible Lines” by Mary Amato. Age 9 and older. $15.99

It’s tough being the new kid in school.

Just ask Trevor, a smart and funny kid who finds himself trying to fit in as the new kid at a new school in Mary Amato’s new book, “Invisible Lines.”

Amato, who lives in Maryland, writes with the humor that readers of her earlier books, including “The Naked Mole-Rat Letters” and “Snarf Attack, Underfoodle, and the Secret Life: The Riot Brothers Tell All,” have come to appreciate.

There’s a lot of that humor in “Invisible Lines.” For example, as the book opens, Trevor, his mom, his little brother and his sister are stuck on a bus, moving to a new place. His mom is about to lose her temper, so “I suck in my cheeks and bug out my eyes like I’m a hot dog being squished to death by the bun.”

But the difficulties of Trevor’s life (his mom has to care for the family without his dad, and there’s not a lot of money for such things as new soccer cleats) will prompt readers to think about how not all kids are alike. As Trevor makes friends with kids who appear to have more advantages in life than he does, you may come to learn — as Trevor does — an important lesson about what really matters in life.

But amid all that learning of important lessons, there will be a good bit of giggling, too. We promise.

— Tracy Grant