Mazebook (Mazebook #1)

A lonely building inspector still grieving the loss of his puzzle-loving daughter receives a mysterious phone call one night from a girl claiming it's her and that she's trapped in the middle of a labyrinth. Convinced that this child is contacting him from beyond this world, he uses an unfinished maze from one of her journals and a map of the city to trace an intricate path through a different plane of reality on an intense and melancholy adventure to bring his daughter back home.