#12 - Worldwide, more books were sold last year

[Adam Tyson]

"Indeed" means something like "in fact," and is used to expand on or support an idea that was already presented. It's like saying "not only is that last thing true, here's more information about it that's also true." It doesn't necessarily indicate an opinion, and in this stimulus, it introduces additional facts. It's not saying that all the books, or most of them, were purchased by professional chefs; it's saying that in addition to the fact that most were not intended for beginners (which tells you nothing about who bought them, only about the intended audience for those books), it's also true that professional cooks bought more than ever before (but we don't have any way of knowing which ones they bought. Maybe they bought books intended for beginners?)

So, no, we cannot make any additional inference based on the use of "indeed" here. It's just more information that expands on the overall discussion.

[Icaa999]

"Indeed" just adds extra info without changing the main point