What is a simile in the book cripsin the cross of lead?

A simile is a figure of speech that compares two different things using "like" or "as." In the book "Crispin: The Cross of Lead" by Avi, a simile could be something like "His eyes were as dark as a moonless night." This comparison helps create vivid imagery and enhances the reader's understanding of the character's appearance or emotions.