> But it also frequently recommends books to me based on a book that I purchased, read, and left a one-star review for. That seems like a pretty obvious mistake

> But it also frequently recommends books to me based on a book that I purchased, read, and left a one-star review for. That seems like a pretty obvious mistake. The reasoning might be that the bad-review signal means that you found the book to be a low-quality instance of its type, not that you discovered that you disliked all of that type. Unless you're being recommended books by the same author, I suppose.