Up front, a very special thank-you to Kerry and Louise, my two first readers, for proving that true honesty is something you will only ever hear from true friends (and younger sisters).
For patiently checking the medical detail, I am sincerely grateful to Dr Denise Stott and Drs Jacqui and Nick Socrates. Any remaining mistakes are entirely my own.
On the subject of mistakes, I tried very hard to make my portrayal of Shetland as accurate as possible, but there were a few occasions when its geography just didn't fit the demands of the story. I hope the islanders will forgive the occasional liberty I've taken with their wonderful landscape.
I relied a great deal on reference material and would like to acknowledge the following works: The Book of Runes by Ralph Blum, Shetland Folklore by James R. Nicholson, British Folklore, Myths and Legends by Marc Alexander, Exploring Scotland's Heritage, HMSO Books, Northern Scotland and the Isles by Francis Thompson, Encyclopaedia of World Mythology by Arthur Cotterell, Shetland: Land of the Ocean by Colin Baxter and Jim Crumley, Around Shetland: A Picture Guide, published by the Shetland Times Ltd, British Regional Geology: Orkney and Shetland 'from the Natural Environment Research Council, Grammar and Usage of the Shetland Dialect by T. A. Robertson and John J. Graham, Bodies from the Bog by James M. Deem, Human Remains: Interpreting the Past by Andrew Chamberlain, Modern Mummies: The Preservation of the Human Body in the Twentieth Century by Christine Quigley, The Scientific Study of Mummies by Arthur C. Aufderheide, Conception, Pregnancy and Birth by Dr Miriam Stoppard and Natural Solutions to Infertility by Marilyn Glenville. For procuring most of these books for me, and never once batting an eyelid at my ever more peculiar requests, I am grateful to Sheila and her colleagues at my local library.
'There are nights when the wolves are silent and only the moon howls' is taken from the book Brain Droppings by George Carlin. Copyright © 1997 Comedy Concepts Inc. Reprinted by permission of Hyperion. All rights reserved.
I would like to thank Sarah Turner at Transworld for her confidence in the book and for her hard work in polishing away its rough edges, and also Kate Samano for her patience and thoroughness.
Last, and by no means least, my heartfelt thanks to Anne Marie Doulton of the Ampersand Agency and to the wonderful Buckman family: the best agents any author could wish for.