But magic, like everything else, follows certain natural laws. Magic needs energy wherever it can find it. If no other source of energy is available, it will take the life force of the magician who created it. That is why every use of magic weakens the magician.

Perenelle shuddered. "You know I hate leprechauns more than almost anything.

One of the oldest secrets of alchemy is that every living thing, from the most complex creatures right down to the simplest leaf, carries the seeds of its creation within itself.

A good story is always a journey. It is about taking the journey, the people the hero meets along the way and how they change him or her. All stories are journeys. They don't have to be shocking or outrageous: they simply have to be interesting.

Some writing courses will advise you to write what you know. I've always thought this is very odd advice ... because it means, for example, that I should not be writing about Nicholas Flamel, because I didn't live in France in the 15th Century, I was not an alchemyst, am not immortal (despite the rumours) and do not know magic.

Her hands flew to her mouth. 'Are we even twins?' Josh rested his hand on her shoulder and brought his forehead to rest against hers, strands of their blond hair mingling. 'I will always be your brother, Sophie. I will always look after you.

When in doubt, we follow our hearts. Words can be false, images and sounds can be manipulated. But this...' He tapped his chest, over his heart. 'This is always true