Why do you need the store to recommend to you what to buy from them next? Obviously the store is only going to recommend content which maximally increases its profits, regardless of whether that content is worth your time or really in tune with your most passionate interests. Buying the book from a shop is a necessary evil (unless you just want to read pirated ebooks from LibGen for free like many Kindle owners are doing now), but for getting recommendations on what to read next, why not look to the numerous internet communities of passionate readers who are not motivated by financial self-interest and may better serve your particular tastes?