It is a satire story book. Penguin Island is written in the style of a sprawling 18th- and 19th-century history book, concerned with grand metanarratives, mythologizing heroes, hagiography and romantic nationalism. It is about a fictitious island, inhabited by great auks, that existed off the northern coast of Europe. The history begins when a wayward Christian missionary monk lands on the island and perceives the upright, unafraid auks as a sort of pre-Christian society of noble pagans. Mostly blind and somewhat deaf, having mistaken the animals for humans, he baptizes them. This causes a problem for The Lord, who normally only allows humans to be baptized. After consulting with saints and theologians in Heaven, He resolves the dilemma by converting the baptized birds to humans with only a few physical traces of their ornithological origin, and giving them each a soul.