You take quizzes like this one to see which book to read next (although you have a pile of tbr books already):
https://www.buzzfeed.com/jarrylee/what-new-book-should-you-read-this-summer-quiz?utm_term=.vdQ6X5xv6x&utm_medium=email&utm_campaign=Books%20622&utm_content=Books%20622+CID_3ba2f222bb5cbdd220b9b1bd0d2c0d65&utm_source=BuzzFeed%20Newsletters#.tvVk6og4kg
