Christie Malry’s Own Double-Entry is a 2000 film directed by Paul Tickell from a screenplay by Simon Bent, based on the 1973 novel of the same name by B. S. Johnson.

It stars Nick Moran as Christie Malry, an accounts clerk in contemporary London who uses the system of double-entry bookkeeping as a way to compensate himself for perceived injustices inflicted upon him by society, committing what he deems to be equivalent acts of revenge that begin with petty acts of vandalism but soon escalate to full-on terror attacks.