Angels and Demons

A common theme expressed in books...
http://en.wikipedia.org/wiki/Angels_%26_Demons
movies &
http://en.wikipedia.org/wiki/Angels and Demons_(film)#Music
in music.
http://en.wikipedia.org/wiki/How_to_Destroy_Angels_(band) ,
http://www.last.fm/music/How+to+Destroy+Angels/_/Ice+Age

http://en.wikipedia.org/wiki/Demons_(Imagine_Dragons_song) ,
http://www.youtube.com/watch?v=mWRsgZuwf_8&feature=kp  

http://en.wikipedia.org/wiki/Hell_and_Silence

 "All Eyes" 

http://www.youtube.com/watch?v=262K67-5_TA&feature=kp 

http://en.wikipedia.org/wiki/Imagine_Dragons , 

http://www.imaginedragonsmusic.com , 

https://myspace.com/imaginedragons

http://www.inquisitr.com/1141472/imagine-dragons-are-they-the-best-band-going