Three cousins get transported back to 1862 to play an important role in the Battle of Puebla, the reason we celebrate Cinco de Mayo today, in this enchanting middle grade fantasy adventure.

History is alive with magic. That’s what zany Tía Xia is always telling cousins Jorge, Camila, and Siggy. Daredevil Jorge couldn’t be more different than his cousins: Camila is a dreamer who adores animals and Siggy is an aspiring influencer who has an exclusive party to attend. And their aunt has many secrets, including a mysterious diamond-encrusted sword that Jorge definitely wasn’t supposed to see.

But when the three stumble upon a time portal in their aunt’s yard, they are transported back to 1862, a past filled with wonders—and dangers. To return to the present, they must race to deliver the sword to General Ignacio Zaragoza in time for the historic Battle of Puebla in Mexico: the foundation of the holiday Cinco de Mayo.

As their journey to Mexico takes them through the Civil War–era United States, the cousins see just how much US history has been shaped by Latine communities. They must find the power within themselves to make sure things happen as they’re supposed to, without altering the past.

Emma Otheguy is the author of several books for young readers, including the picture books A Sled for Gabo and Martina Has Too Many Tías, the bilingual picture book Martí’s Song for Freedom, and the middle grade novels Sofía Acosta Makes a Scene, Cousins in the Time of Magic, Silver Meadows Summer, and, with Adam Gidwitz, The Madre de Aguas of Cuba, part of the Unicorn Rescue Society series. Visit her at EmmaOtheguy.com.

Poly Bernatene was born in 1972 in Buenos Aires, Argentina, and has been drawing ever since. He graduated from Buenos Aires’s art school, where he developed a great interest in managing different techniques in his work. He has worked in advertisement, animation, and comics. During the last fifteen years, he has established an exciting career as a professional illustrator, having published more than sixty children’s books in eleven countries.