Sarah Manavis writes: “With the vast amount of books and user data that Goodreads holds, it has the potential to create an algorithm so exact that it would be unstoppable, and it is hard to imagine anyone objecting to their data being used for such a purpose. Instead, it has stagnated: Amazon holds on to an effective monopoly on the discussion of new books—Goodreads is almost 40 times the size of the next biggest community, LibraryThing, which is also 40% owned by Amazon—and it appears to be doing very little with it.”