Reddit mentions of The Rails 5 Way (4th Edition) (Addison-Wesley Professional Ruby Series)

If you're looking to learn Rails, why not start with a copy of the old standby The Rails Way? The OWASP wiki is a good start for web application security.

Speaking personally: rarely have I learned much of significance from classes, checklists, or step-by-step tutorials. None of these things will deeply improve your ability to understand a codebase. They are a crutch until you can learn more. It's like learning a language from a textbook. You may learn how to say some words, but it will not help you understand the culture.

Learning more is the hardest part. Good information in engineering is not usually spoon fed to you, and the knowledge to develop robust web applications is not something you can git clone. You gain it through experience and messing up your toy applications, through seeking better answers. They may be lurking in IRC, StackExchange, Wikipedia or strange Twitter links. Explore and branch out. Find people you respect that make you feel like an absolute idiot, and read what they write, learn how they think. IMO this is the real key to progress in web dev or whatever else. It has worked for me so far. I still feel stupid, but I think that's probably a good thing.