Everybody here is dismissing the idea that business could be affected because book stores are in some kind of other category - what about tech and software like

book2: language learning platform

Galaxy Book2: Samsung Product

book.com: Barnes & Nobles URL

duelingbook.com: Yu-Gi-Oh! Simulator

books24.in: Online Billing

book24.ru: Web book store

bookweb: American bestseller association

...

I understand the idea of trademarks and would not call it a bad one - it makes sense that companies want to protect their name from direct copycats in the same sector. It is fair that some companies protect deviations from their actual name, too (Twitter, tweets. Microsoft Windows 10, Win10). But nobody calls "Facebook" "book" and it's not like they have a palette of products with the word in it, like iPhone/iPad/iOS or something. If somebody can explain how they're possibly acting in good faith here please elaborate, but I hope they get shut down, especially since it is well established that megacorps can just keep bullying regarding trademarks and the like, even if they are clearly wrong [0].

[0] https://nissan.com/