My 8 year old son has read this book in one evening (night?) During the holidays. Positive criteria for this novel mixing fantasy and adventure he has read a draft, told me the story with passion ... and hope to have the next book! For my part, I add an attractive illustration from the first cover, a hero presentation page (Sophie, Sam and the goblin king) with its illustration and explanatory text, an extract from the Book of Shadows (that, the Kids love books containing secret), a dynamic writing, a medium-sized script which is an asset for forbidding children to play, an original story (a girl finds "Keeper of the Magic Door", held between our world than the Forest of Shadows containing magical and disturbing beings). Plus: this novel is the first in a series, as the heroine must find 5 gems at the end of the story.