If you're an author, it's very easy to become obsessed with discoverability; i.e. how do you get your book found? 


Many authors fixate on getting their book into BookBub, which is a paid book promotion newsletter -- it's free for readers, and you've probably heard of it or are subscribed (on a side note, if you are, what do you think of it?).


Recently BookBub shared some of their findings on what they've found makes readers more likely to click a book link.


The BookBub presentation.


So I wondered, is there anything that absolutely guarantees that you'll add a book to your towering TBR piles?