It looks like the author got tired of the process towards the end as some errors and omissions appear to sneak in.
Page 73/74: The text 'introduces' two additional classes (ShoppingCartViewModel and a ShoppingCart), whereas the sections immediately above describe those classes (subtle issue, I know - looks like the result of restructuring the document section sequence)
Top of page 74 sentence: "Here’s the complete StoreManager controller class", whereas the class below is actually (correctly) the ShoppingCartController class.
At no point in the tutorial can I see where you add code to allow the user to add albums to the shopping cart (not that it's too hard to work out - I managed - just a completeness thing)
Also - the creation of the CartSummary Partial View is never discussed in the document.
Also: Can people comment on the level of 'best practice' represented in the tutorial. I understand the close coupling between the DB and the models is undesirable (and implemented as it to keep the tutorial simple, but 'real' at the same time) - so I'm thinking
about the best practice concerns regarding the ASP/MVC aspects of the tutorial (use of controllers, the views, use of JSON and JQuery, Authentication etc.) rather than the application architecture.