The Devil’s Triangle by Toni De Palma
Seventeen-year-old Cooper dies in an attempt to burn down his school and awakens in the afterlife. Lucy, the Devil’s sister who has crossed party lines, decides to give Cooper another shot at heaven. The deal? Cooper must return to Earth and find a girl named Grace. The rest is up to him. While Cooper figures out his mission, he’s thrown into the life he’s always wanted. Great parents, a spot on the Varsity football team and a real future are all within reach. But what he really wants is Grace, a feisty girl with an abusive boyfriend who can pound Cooper into pulp if he isn’t careful. While Lucy plays demonic-puppeteer, clues to an unknown past between Cooper and Grace start to unravel. Cooper discovers that what’s keeping him and Grace apart is far more sinister than anything this bad boy could have ever imagined.