OK," Josh said evenly, "I've seen men made of mud, I guess I can accept spying rats. Do they talk?" he wondered aloud. Don't be ridiculous," Flamel snapped, "They're rats." Josh really didn't think it was a ridiculous suggestion.

The best moment is when you walk into a bookstore and see a pile of your books - that is the oddest experience in the world!

Being immortal must have a lot of attractions. You can travel all over the world, see everything, do everything. But what happens if you are immortal and your friends and family are not? You are then destined to watch them age and die.

You are not living, you are surviving.

Books are just dead words on paper and it is the readers who bring the stories alive. Previously, writers wrote a book and sent it out into the world. A couple of months after publication letters from readers might arrive. And, leaving aside the professional reviews, it is really the reader's opinions that the writer needs. They vote for a book - and a writer - with their hard earned cash every time they go into a bookstore (or online - that's my age showing!) and buy a book.

Adults, Sophie has decided a long time before, were really bad at making up good excuses.

But the truth is a double-edged sword; it is a dangerous thing.