The one thing I am fascinated about with HBO’s Westworld is its use of piano ballad cover songs. Sure the mystery of the world and the sci-fi elements have their intrigue, but the music and how it’s woven into the narrative is much more fun to figure out and break down.

So when you hear something like Nirvana’s “Heart-Shaped Box” play in the newest trailer for the upcoming second season, you have to wonder, why did they use that song. Check out the latest trailer for Westworld season 2, below.

As part of Amazon’s monthly Kindle deals, Joe Hill‘s Heart-Shaped Box is on sale for only $1.99 (that’s 87% off the regular price of $14.99). If you’d like to purchase a physical copy of Heart-Shaped Box, the book is also available in paperback.

Hill’s Horns is also on sale for Kindle for only $1.99 (the paperback is on sale for only $6).

Be sure to check out this month’s Kindle deals: 100 Kindle Books For $3.99 or Less.