With this book we're back again in the world of the Cemetary of Lost books. It isn't as good as The Shadow of the Wind but you definitely find Mr. Zafón's great style. It's the third book in a series of four volumes. It tells lots of things that happened before the beginning of The Shadow of the Wind and tries to fill some of the missing links between the two previous novels. It also seems like the preparation of the fourth and final volume.