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      Published by HarperCollinsPublishers Ltd

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      London SE1 9GF

       www.harpercollins.co.uk

      Fully revised and expanded edition published 2016

      First published in Great Britain in two volumes by HarperCollinsPublishers as Agatha Christie’s Secret Notebooks and Murder in the Making 2009, 2011

      Copyright © John Curran 2009, 2011, 2016

      Agatha Christie Notebooks, The Man Who Knew, The Incident of the Dog’s Ball, The Case of the Caretaker’s Wife and The Capture of Cerberus copyright © Christie Archive Trust 2009, 2011

      Quotations copyright © Agatha Christie Limited 2009, 2011

      Agatha Christie®, Poirot®, Marple® and the Agatha Christie Signature are registered trade marks of Agatha Christie Limited in the UK and elsewhere.

      All rights reserved

       www.agathachristie.com

      Cover layout design © HarperCollinsPublishers Ltd 2016

      Cover design by Henry Steadman

      Photograph of Agatha Christie © Popperfoto/Getty Images

      John Curran asserts the moral right to be identified as the author of this work.

      A catalogue copy of this book is available from the British Library.

      This novel is entirely a work of fiction. The names, characters and incidents portrayed in it are the work of the author’s imagination. Any resemblance to actual persons, living or dead, events or localities is entirely coincidental.

      All rights reserved under International and Pan-American Copyright Conventions. By payment of the required fees, you have been granted the non-exclusive, non-transferable right to access and read the text of this e-book on-screen. No part of this text may be reproduced, transmitted, down-loaded, decompiled, reverse engineered, or stored in or introduced into any information storage and retrieval system, in any form or by any means, whether electronic or mechanical, now known or hereinafter invented, without the express written permission of HarperCollins.

      Source ISBN: 9780008129620

      Ebook Edition © October 2016 ISBN: 9780008129644

      Version: 2017-04-11