Table 1.1 "How rows and columns can look in a relational database table" the example data is repeated.
In the text you talk about additional elements that support the blog engine, but the image is the same as the previous. Angular is missing for example.
In appendix A.2 template literals it states:
You can embed expressions inside the literal by placing them between curly braces prefixed with a dollar sign.

But the examples are without dollar sign and don't work.