The contents of this text have been shaped by the editor's experiences on task forces set up to investigate major explosives incidents and the related civil and criminal proceedings. The topic is presented from the perspective of experienced professionals from industry, government and the private sector from medical and legal professionals who give accounts of the developments and techniques in each of their subject areas. The contributors provide descriptions of the physics and chemistry of explosions and explosives, the detection of hidden explosives, the procedures carried out at the scenes of gas explosions in buildings, criminal bombings and air crashes, as well as methods, applications, quality control and significance of forensic chemistry, aircraft sabotage investigation, forensic pathology and presentation of expert testimony.