"a foul-mouthed and mercurial Jehovah's Witness named Marío Sepúlveda steps to the fore," - Deep Down Dark - book review
'In the face of feckless leadership from the shift supervisor, a foul-mouthed and mercurial Jehovah's Witness named Marío Sepúlveda steps to the fore, rallying his companions to keep the faith in their darkest hours.'
Deep Down Dark
The Untold Stories of 33 Men Buried in a Chilean Mine, and the Miracle That Set Them Free
http://www.latimes.com/books/jacketcopy/la-ca-jc-hector-tobar-20141005-story.html