Some songs by them: Whispers in the Dark, Monster, and Hero.
Skillet is a band my friend introtuced me too about 4 months ago. The first song I ever heard by them was Monster. I fell in love with that song, and soon started listening to other songs by them. One reason why I love this band is because I can relate a couple of the songs to me. Especially Monster. They kind of have the same sound as Three Days Grace(in my opinion)