Congratulations on getting this far! I won't be covering any new topics in hapi in this book, but hopefully, I've convinced you on hapi as a great choice for your next project or for integrating with a current one. I just wanted to take some time before finishing up to point out some places where you can further your learning on hapi.
The first place I would turn to learn more about hapi is the code repository associated with this book. As mentioned in each chapter, all code examples associated with the book are located in a GitHub repository at https://github.com/johnbrett/Getting-Started-with-hapi.js. If you find that any examples were tough to grasp, or would like to explore them in more detail, I recommend cloning the repository and running each example while taking a look at the code. Trying to expand on any of the code examples will be your best source of learning hapi, Node, or coding in general. If you have any further questions...