Gadzooks is David's special dragon. He is a writing dragon and aided him in writing Snigger and the Nutbeast, as well as White Fire, which he just was able to finish before he "died". Gadzooks and David had a rough relationship in this book. Gadzooks was helping him write, and even showing him glimpses of the future, but David didn't believe in him. In fact, he punished him: he sent him to his bookshelf, and then he went away from David's imagination and came back once he apologized and said.