A book with an app …

… Bryan Appleyard — Iain Pears: Arcadia by a Chap. (Hat tip, Dave Lull.)

The book is 180,000 words long, but there are a total of 250,000 words in the app, which overcomes the problem of staying on top of a complex plot by offering the reader different ways of moving back and forth. You can choose any of the seven main characters to view the action, and you can dig down and find further information, such as the geography of Anterworld. In effect, you get 10 novels, all with the same plot, and all ending up at the same place, but which, when read on the app, become significantly different thanks to the different characters’ points of view.