Inkspell by Cornelia Funke

A year has passed, but not a day goes by without Meggie thinking of Inkheart, a book whose characters came to life. Resa is back, but she has no voice. For the fire-eater Dustfinger, the need to return to the tale has become desperate. When he finds a crooked storyteller ,Orpheus, to read him back, he abandons his apprentice Farid, and plunges into the pages. Orpheus doesn't read Farid back into the book like he was supposed to, he leaves the name "boy" out...