"Based on a true story, the tale of one girl's perilous journey to cross the U.S. border and lead her family to safety during the Mexican Revolution"--

Josefina hopes to become a "curandera" or healer like Tía Magdalena, and she is tested just before her tenth birthday when a friend receives a potentially fatal snakebite.

Josefina and her sisters distrust learning to read and write, as well as other changes their Tía Dolores is bringing to the household, because they fear they will lose their memories of their mother.

As a thank-you from Merlin and Morgan, Jack and Annie are sent on what should be a vacation at a luxurious resort in Cozumel, Mexico, but is, by mistake, an adventure with ancient Mayans, instead.

Now that she has found her brother Montez, Magdalys and her squad have embarked on a secret mission for General Grant, taking them deep into the Louisiana swamplands, to New Orleans, and eventually to the Mexican border where Imperial troops are forming an alliance with the Confederates in pursuit of spreading slavery--and once more Magdalys will have to use her telepathic link to the dinosaurs to save herself, her squad, and the union she believes...