Agile is often called a methodology, but it is really a collection of values and principles. If you forget what Agile is in following a methodology, you'll be like this story about a prince. For the free book, continue below....
I've published a book called "Starting Agile" that is designed to help you start your team's Agile journey out right. You can buy a copy from Amazon, but I'm giving free copies away to my subscribers from YouTube. You can signup for a copy at this link:
https://www.xeric.net/#starting-agile