Mechagonosis — Douglas Thompson

Scott Malthrop is a murderer with a difference: his entire house is filled with an enormous device gradually assembled by him and his father over four decades. Known only as "The Machine" the device seems to transport Malthrop to different locations in space and time by feeding off his memories and a vast array of sentimental objects and trophies taken by Malthrop from his own past and that of his victims. As Malthrop's experiments become ever more violent and life-threatening, they cause distortions in the surrounding quantum fabric, and spark off pursuit from two very different directions: a local Police Inspector and two "Angels" sent back from the end of time.