The newly-launched Clean Reader program hides all explicit and rude words in novels in eBook format and replaces them with tamer alternatives, leading to cries of censorship from leading writers including Chocolat novelist Joanne Harris, who wrote a scathing blog post about the app this week (beg23Mar15).

Following a response from the app's U.S. creators, she wrote in another post, "Writers of fiction choose their words (including what you refer to as profanities) very carefully. We generally don't write 'for context', but to create an effect. By allowing words to be replaced or blanked out, this effect is reduced to a clumsy translation, or negated completely. To enable a writer's work to be modified without permission, then for you claim that nothing much has been altered, is to completely misunderstand the nature of fiction writing."

Robert Harris, who wrote the books behind films including Enigma and The Ghost Writer, tells Britain's The Independent newspaper, "I don't use swear words lightly in my books. It's done for a reason. This app does not sound appealing in any way", while Cooper adds, "I would hate for someone to remove all the swear words in my books - they would lose their pulse... This app is ridiculously prudish, but hysterical at the same time."

The creators have defended themselves against the criticisms, insisting they are not censoring stories because the Clean Reader function can be turned on or off.