This is what You get if You throw a mistery,a philosopy book,a natural sciences paper and the talking gecko of human condition in the same pot, and then cook it for a while.Excellent combination.However,I don't recommend it for a first timer Gaarder reader, the Joker idea first appears in"The Solitaire Mistery",which is an easier, more playful read,therefore You should start there,(and Sophie's world,if You want to know more about the history of western philosophy.)It's a non stop brain storming that'll require Your full attention and it is so worth it.