What would you want from a book on Serverless architectures in 2020?

Hypothetically, what would you find most useful in a book (say, 300-500 pages) on serverless architectures on AWS in 2020?

A run-through of the different services and features (e.g. Lambda, API Gateway, AppSync) + a series of mini-projects to follow along?

An overview of what is serverless, and how to connect Lambda to different services to build a basic API + an over-arching project that spans across the whole book as we cover topics such as authentication, logging + monitoring, APIs and data processing (queues, streams, etc.)?

A collection of deep dives into successful serverless architectures in the real-world. Looking at architectural patterns, learnings and pitfalls to look out for?

Or maybe something else? (please elaborate in the comments)