This Horrid Practice: The Myth and Reality of Traditional Maori Cannibalism is a 2008 non-fiction book by New Zealand historian Paul Moon.

The publication of This Horrid Practice was controversial because of the book's determination that cannibalism was widespread among New Zealand Māori until the mid-19th century.

[3] The book prompted an anonymous but formal complaint to the New Zealand Human Rights Commission, arguing that it "describes the whole of Maori society as violent and dangerous.

[5] Moon responded by stating that Mutu had "condemned me and announced to the media that I did not understand the history of cannibalism, although she admitted to not having read even a single sentence of the book.

[3]Referring to the book, Dr Rawiri Taonui, New Zealand's first professor of Indigenous Studies, says about the author, "He's looked at no Maori language evidence, nothing from the Māori Land Court.