Irving v Penguin Books Ltd
David Irving v Penguin Books and Deborah Lipstadt is a case in English law against American historian Deborah Lipstadt and her publisher Penguin Books, filed in the High Court of Justice by the British author David Irving in 1996, asserting that Lipstadt had libelled him in her 1993 book "Denying the Holocaust". The court ruled that Irving's claim of libel relating to Holocaust denial was not valid under English defamation law because Lipstadt's claim that he had deliberately distorted evidence had been shown to be substantially true. English libel law puts the burden of proof on the defence, meaning that it was up to Lipstadt and her publisher to prove that her claims of Irving's deliberate misrepresentation of evidence to conform to his ideological viewpoints were substantially true.