I like the idea presented here but I think a mix of approaches is needed. After the author's chapter 2, "Chapter 2: Suits (String concatenation, Int vs literal

I like the idea presented here but I think a mix of approaches is needed. After the author's chapter 2, "Chapter 2: Suits (String concatenation, Int vs literal string)" I would want to extend it to say on top of strings and ints we also have booleans, floats, null, and any other primitives and why they're useful (maybe these show up in the lessons, maybe they don't). I'd do the same for chapter 3 too. After learning about arrays I'd want to include a section on other objects that are common, maps, sets, linked lists etc. Both styles need to be mixed together imv.