Flatland is a classic, unlike Discworld; Rev. Edwin Abbott conceived of not just a two dimensional space, but four dimensional, one dimensional and zero dimensional spaces. The work also contains exquisite social satire, with Flatland mocking those aspects of Victorian society incompatible with Christianity, namely the racist, classist and sexist attributes.
And he was also a great schoolteacher, who wrote a much used Latin textbook, Via Latina, and an ordained priest and talented theologian in the Church of England, who continued to do interesting literary and theological work throughout his life.
I have a great admiration for Rev. Abbott, and nis skill at making people think in new ways; he was, like me, an imaginative clergyman with a penchant for science fiction and a disdain for the even more corrupt morality of the modern era, in which racism remains and is probably worse, sexism is worse due to imposed tolerance of the abuse of women which is doctrinally mandated in Islam, and which is unique to Islam, under the banner of multiculturalism (while allowing what amounts to hate speech against the Chassidic and Charedi branches of Judaism and against conservative Christians for conduct which does not begin to compare with what Muslims of the Shi’a Jafari and the Sunni Shafti, Hanbali and Maliki fiqhs (schools of jurisprudence) inflict upon their women, but in addition to our hypocritical racism and sexism, we have added gross sexual immorality, impiety, irreligion and a clinical disregard for human life with our abortion clinics and doctor-assisted homicides on a scale that makes the evil 19th century King Leopold of Belgium look like a great humanitarian.