What is a metaphor in Ida B?

In the book "Ida B" by Katherine Hannigan, a metaphor is a literary device used to compare two unlike things without using "like" or "as." It is used to create vivid imagery and convey deeper meanings. An example of a metaphor in "Ida B" could be when the author describes Ida B's emotions as a storm brewing inside her, symbolizing her inner turmoil and conflicting feelings.