After a lone gunman opens fire on a busload of Asian-American children and then kills himself, forensic psychiatrist Leander Heartwood and police officer Gabriel Chin investigate the crime, a probe that takes them into the dark underside of contemporary society.
Used availability for Philip Caputo's Equation for Evil
February 1996 : USA Hardback
February 2014 : USA Paperback
February 2014 : USA, Canada, UK Kindle edition