Ravens by George Dawes Green

The Boatwright family has just won $318 million in the Georgia lottery. Shaw McBride hears of the Boatwright's windfall while he's on his way to Florida with his friend, Romeo Zderko. Shaw hatches a plan to claim half of the lottery money by ingratiating himself with the family and then threatening to have Romeo start killing the Boatwrights' close relatives if they don't give him the cash. In the novel, the reader sees the situation through many of the characters' eyes, which gives it a psychological bent. Will Shaw be able to keep the family in a constant state of fear so they follow his orders or will they find some way to keep all the winnings themselves?