This chapter is all about AWS Lambda. Lambda gives us a way to run code without having to manage servers. It's our most granular building block when it comes to building serverless applications and can be used in many different ways. It's important that you understand this chapter in particular because Lambda really shapes the way we do things in AWS—I guarantee that having this knowledge in your toolbelt will come in handy.

We're going to begin by learning about the characteristics of a function and some of the common areas we can use them in serverless applications. From there, we're going to dig into the security model and learn about the difference between invocation types and event sources. Then, we will learn more about the anatomy of a function and about the tools we need, all of which will lead to us deploying...