Muki has always lived on the island of Mariposa. His parents moved there before he was born—it’s the only home he’s ever known. When the government divides the citizens of Mariposa into two factions—butterflies and moths—Muki and his family are at risk. Butterflies are only people with long family history on Mariposa, and anyone newer than three generations is considered a moth. Camps are set up to house all the moths before they’re deported to other countries. A resistance movement led by Muki’s parents is underway, however, and ready to expose any cracks in the president’s armor. Muki’s grandmother (Paati) is detained, his parents are in hiding, and he’s not sure who he can trust help lead the resistance.

This is a harrowing tale of courage, family, strength, and determination. Though set on the fictional island of Mariposa, the theme touches on many contemporary immigration issues and it does so in an age appropriate and accessible way. The story is engaging, Muki is a very relatable character (as are his friends and family), and the pacing is perfect. Readers will find themselves thinking about Muki and his fellow Mariposans long after finishing this book.

Recommended for readers 4th grade and up and for Cream of the Crop. Reviewed by Jessie Trafton, Skidompha Library, Damariscotta, ME