Jason Castro returns with new album 'Only a Mountain'

If you still think of Jason Castro as the easygoing folkie from American Idol, his new album may surprise you. For one thing, the dreadlocked singer from the show's seventh season has picked up an electric guitar. For another, Only a Mountain - out today - depicts a young man more familiar with life's struggles than he was three years ago when he released his first album.

Since that time, Castro...