《二维国内外:数宇漫游奇历记》是一本有着严肃科学寓意的著述。讲述了一个名叫二维国的、有两个维度的欧几里得平面世界。在这个二维国里，生活着一些几何图形：有直线、三角形、四边形、五边形，等等。这是一本有着严肃科学寓意的著述。艾勃特的目光集中在第四维度：维数大于三的空间是否能够存在呢？这第四维当向何处安放呢？为了化解读者对这一古怪概念所存的芥蒂，艾勃特引导大家去设想二维国民会如何面对可能存在着第三维的观念。

'Upward, yet not Northward.' How would a creature limited to two dimensions be able to grasp the possibility of a third? Edwin A. Abbott's droll and delightful 'romance of many dimensions' explores this conundrum in the experiences of his protagonist, A Square, whose linear world is invaded by an emissary Sphere bringing the gospel of the third dimension on the eve of the new millennium. Part geometry lesson, part social satire, this classic work of science fiction brilliantly succeeds in enlarging all readers' imaginations beyond the limits of our 'respective dimensional prejudices'. In a world where class is determined by how many sides you possess, and women are straight lines, the prospects for enlightenment are boundless, and Abbott's hypotheses about a fourth and higher dimensions seem startlingly relevant today. This new edition of Flatland illuminates the social and intellectual context that produced the work as well as the timeless questions that it raises about the limits of our perception and knowledge. --This text refers to an out of print or unavailable edition of this title.