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Epub ISBN: 9781407062853
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First published in the UK in 2010 by Vermilion, an imprint of Ebury Publishing
A Random House Group Company
Copyright © 37signals, LLC. 2010
Jason Fried and David Heinemeier Hansson have asserted their right to be identified as the authors of this Work in accordance with the Copyright, Designs and Patents Act 1988
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A CIP catalogue record for this book is available from the British Library
ISBN 9780091929787
Illustrations by Mike Rohde