Long Drop by Denise Mina
William Watt wants answers about his family's murder. Peter Manuel has them. But Peter Manuel is a liar.
William Watt is an ordinary businessman, a fool, a social climber. Peter Manuel is a famous liar, a rapist, a criminal. He claims he can get hold of the gun used to murder Watt's family.
One December night in 1957, Watt meets Manuel in a Glasgow bar to find out what he knows. Based on true events, The Long Drop is an extraordinarily unsettling, evocative and compelling novel from a writer at the height of her powers.