Why is Esperanza Rising a good title for this book?

Most books are written because the author feels they have something important to share with the reader.

In the case of Esperanza Rising, the author (Pam Muñoz Ryan) was inspired by the stories of her grandmother, who lived through the Mexican uprising and the Great Depression.

By sharing (and embellishing upon) those stories, she has created a work of historical fiction which helps ensure that the trials and tribulations of Mexican immigrants in the early part of the 20th century won't be soon forgotten.