Although this book has been written by just two people, many hundreds of others have helped us, albeit unwittingly. They are too numerous to mention by name, but they include all our colleagues at Abram, Hawkes plc as well as the many clients who were trusting enough to hire us. We had 15 years of learning, stimulation and fun. Our thanks are due to everyone we worked with.
Our thanks also to Valoris Ltd, the company that acquired Abram, Hawkes, for giving us access to many of the illustrations and examples in this book.