Arcadia is about dreaming a world into existence. Or, two worlds really. Which, if you assume the world of 1960 Oxford is the “real” world, makes three total worlds in one book. The worlds overlap and influence each other in many a way and cause and effect is unclear at best. Because at one point it’s revealed that it’s not really different worlds, it’s time travel in the same world. But when are these worlds and how did they get that way?
(The publisher released an iPad app where you can trace the individual stories. I read the print book, but I’m curious to experience it that way too. )