Final book in the Deptford trilogy that starts with Fifth Business, and the narrator returns to being Dunstan Ramsay of the first book, although mostly he is framing the story being told by others. Mostly it's the story of Paul Dempsey, who was a boy in Deptford with Ramsay (and Staunton), and his experiences on the way to becoming the famous magician Magnus Eisengrim.

The whole trilogy revolves around a death that happens at the end of Fifth Business, and the circumstances of the death are finally resolved (or as much as they can be) by the end of World of Wonders. Really though I think the trilogy is less a murder mystery and more an illustration of how very differently events are seen, interpreted, and remembered by different people; and also how events far in the past can tie people together for a lifetime and still affect who they are and how they act decades and decades later.