Here's how it breaks down:
* Phrase: "Ready, aim, fire" is a three-part phrase used to describe a process of preparation, targeting, and execution.
* Common Expression: It's a common phrase used to refer to any action that requires careful preparation and execution, from shooting a gun to making a decision.
* Metaphor: It can be used metaphorically to represent different stages in a process:
* Ready: Preparation, planning, gathering resources.
* Aim: Setting goals, focusing, identifying targets.
* Fire: Taking action, executing the plan, achieving the goal.
To understand how "ready, aim, fire" might be used in literature, you need more context. Tell me what specific book or passage you're referring to, and I can help you identify the literary device being used.