It would not have been possible to complete this book without the involvement of the following:
each of whom provided (out of their own time) invaluable guidance from their wealth of professional knowledge, for which I am extremely grateful.
I would also like to thank Sam Whittaker and Monica Twine at the publisher, John Wiley & Sons, for their patience and help in the production of the book.
In particular, I would like to say a special thank you to Elaine Dalgleish and Kevin Croot, whose dedication to the review of the entire book (including numerous iterations of many chapters), from an accuracy, continuity and grammatical perspective, has been paramount in its completion.
Finally I thank my wife Allyson, who not only allowed me to indulge my desire to write the book, but also corrected my grammar.